Enfermedades Contagiosas

Acetyl-L-Carnitine (ALCAR) crosses the blood-brain barrier and is specifically included in clinical post-COVID recovery protocols for its mitochondrial energy support and neuroprotective effects relevant to brain fog and cognitive fatigue. Included in the MitoCore formulation recommended in the Holistic Primary Care post-viral recovery protocol (2023). It has RCT evidence for fatigue reduction in chronic fatigue syndrome.

AHCC (Active Hexose Correlated Compound), a shiitake mushroom extract, has clinical evidence for modulating immune function to support resolution of persistent viral infections. A Phase II RCT at UT Health demonstrated AHCC 3 g/day supported host immune clearance of persistent HPV infections. AHCC has been shown to decrease infection risk and ameliorate symptoms of existing viral and bacterial infections in clinical studies.

Alpha-lipoic acid (ALA) is a mitochondrial antioxidant included in published post-viral recovery clinical protocols, specifically for its role in mitochondrial energy support and oxidative stress reduction. The VA Long COVID clinical guide (2023) recommends ALA alongside CoQ10 and NAC for mitochondrial support. An RCT in fibromyalgia patients found CoQ10 combined with ALA (and other nutrients) significantly reduced pain scores.

Post-viral conditions such as Long COVID and ME/CFS are associated with altered mitochondrial function and impaired cellular energy metabolism. A 2025 integrative medicine review identified D-ribose as exceptional at restoring pre-viral energy levels. The underlying CFS evidence base (two open-label trials in 41 and 257 patients) supports energy, mental clarity, and sleep improvements relevant to post-viral fatigue.

Andrographis (Andrographis paniculata) has clinical trial evidence for reducing symptom severity and duration in viral respiratory illness. A Thai RCT in mild-to-moderate COVID-19 found that 60 mg extract three times daily improved cough within days and led to full recovery within 3 weeks. It also significantly reduced the inflammatory cytokine interleukin-1 beta by day 5.

Andrographolide, the principal bioactive diterpene of Andrographis paniculata, demonstrates antiviral activity against multiple respiratory viruses and reduces inflammatory cytokines relevant to post-viral recovery. Clinical and preclinical data show NF-κB inhibition, IL-1β suppression, and antiviral interference with viral RNA synthesis. It underpins the evidence for the parent herb in COVID-19 and viral respiratory illness recovery.

Apigenin is a dietary flavone with anti-inflammatory, antiviral, and anxiolytic properties relevant to post-viral recovery. It inhibits SARS-CoV-2 replication in vitro, reduces neuroinflammation via microglia modulation, and has documented GABAergic activity relevant to post-viral sleep and anxiety symptoms.

Ashwagandha (Withania somnifera) is classified as an adaptogen with multitarget effects on the neuroendocrine-immune system relevant to post-viral recovery, including stress hormone modulation, immune enhancement, and anti-inflammatory effects. It is listed among key adaptogens for COVID-19 post-viral recovery by authoritative herbal medicine reviews. RCTs demonstrate significant improvements in fatigue, sleep quality, and stress resilience.

Astragalosides—principally astragaloside IV and cycloastragenol—are the primary bioactive saponins of Astragalus membranaceus with demonstrated immunomodulatory and mitochondria-protective effects relevant to post-viral recovery. They activate telomerase and support immune cell function. A 2025 TCM systematic review identified astragaloside-containing preparations as enhancing mitochondrial function and ATP production in long COVID management.

Astragalus (Astragalus membranaceus) is one of the most frequently used herbs in post-viral fatigue treatment, identified in a 2024 systematic review (PMC10956782) of Chinese herbal medicine RCTs as among the top herbs prescribed for post-viral fatigue (dosing 10–50 g). It enhances mucosal immune function, promotes immune cell maturation, and improves antibody expression. The VA Long COVID guide references astragaloside compounds for mitochondrial support.

Baicalin, a flavone glucuronide from Scutellaria baicalensis (Baikal Skullcap), has documented antiviral activity against SARS-CoV-2 and other respiratory viruses, and anti-inflammatory properties that reduce cytokine storm pathology relevant to post-viral recovery. It is included in post-viral anti-inflammatory clinical protocols (Holistic Primary Care, 2023).

Baikal Skullcap (Scutellaria baicalensis) is the source of baicalin and baicalein, with antiviral activity against SARS-CoV-2 and documented use in post-viral anti-inflammatory clinical protocols. A post-COVID physician recovery protocol (Holistic Primary Care, 2023) includes Scutellaria baicalensis (Skullcap) as part of the ITIS anti-inflammatory herbal complex for 90-day post-COVID management.

Beta-glucans derived from fungal and yeast sources are extensively studied biological response modifiers that engage Dectin-1 receptors on immune cells, restoring macrophage and NK cell function depleted post-virally. A 2023 RCT (n=126) showed reishi beta-glucans significantly increased immune cell populations. Beta-glucans from mushrooms including Lentinan (shiitake) show good potential for recovery from COVID-19-related immune impairment.

Bifidobacterium longum is one of three specific probiotic species highlighted in a 2025 PMC systematic review (PMC12566607) as having clinical trial evidence for alleviating long-term COVID-19 symptoms. It supports gut barrier restoration and immune modulation impaired in post-viral states.

Boswellia (Boswellia serrata), also known as Indian Frankincense, contains boswellic acids with potent anti-inflammatory activity via 5-LOX inhibition. It is included in post-viral recovery anti-inflammatory protocols. A post-viral recovery clinical protocol (Holistic Primary Care, 2023) includes Boswellia/Frankincense as part of an herbal anti-inflammatory combination for COVID recovery.

Boswellic acids are the primary anti-inflammatory triterpenoid constituents of Boswellia serrata with selective 5-LOX inhibitory activity. They reduce leukotrienes, cytokines, and NF-κB signaling relevant to resolving post-viral respiratory and systemic inflammation. Clinical RCT evidence exists for their anti-inflammatory efficacy, and they are included in structured post-viral recovery anti-inflammatory protocols.

Bromelain, a proteolytic enzyme complex from pineapple, has been included in post-COVID recovery clinical protocols for its anti-inflammatory, fibrinolytic, and mucolytic properties. An RCT (PMC8472462) tested systemic enzymes including bromelain for post-COVID fatigue, showing benefits in resolving post-viral inflammatory burden and improving fatigue outcomes.

Bovine colostrum contains immunoglobulins, lactoferrin, and growth factors that support mucosal immunity and gut barrier restoration impaired in post-viral states. Clinical evidence shows colostrum supplementation reduces incidence and severity of upper respiratory infections and supports gut immune recovery relevant to post-viral rehabilitation.

CoQ10 is a fat-soluble mitochondrial electron carrier with a direct mechanistic link to post-viral fatigue. Research documents depleted CoQ10 in post-viral syndromes including ME/CFS and long COVID, with clinical trials showing supplementation reduces fatigue and pain in fibromyalgia and related post-viral fatigue conditions. A dedicated 2024 PMC review (PMC10779395) evaluated CoQ10's role in post-viral fatigue syndrome.

Cordyceps has preliminary RCT evidence in COVID-19 recovery specifically, with a double-blind, placebo-controlled study showing Cordyceps 500 mg three times daily as adjuvant therapy resulted in shorter time to clinical recovery and higher recovery rates vs. placebo in mild-to-moderate COVID-19. Traditional TCM use for post-illness fatigue is centuries old. Antiviral activity against Picorna viruses and coronaviruses has been documented.

Creatine has been investigated specifically for post-COVID fatigue in a clinical trial, showing fatigue reduction after 3 months of supplementation in post-COVID fatigue syndrome patients (Food Science & Nutrition RCT). Post-COVID patients have lower creatine levels in brain and muscles. Creatine supports cellular energy production (ATP-PCr system) and neuroprotection relevant to post-viral fatigue.

Creatine monohydrate is the most bioavailable and studied form of creatine, with an RCT published in Food Science & Nutrition demonstrating fatigue reduction in post-COVID fatigue syndrome after 3 months of supplementation. Post-COVID patients have lower brain and muscle creatine levels. Creatine monohydrate supports ATP regeneration directly impaired in post-viral mitochondrial dysfunction.

Curcumin, the principal polyphenol of turmeric, has been included in post-viral recovery protocols for its potent anti-inflammatory and immunomodulatory effects. An integrative medicine review (Liebertpub, 2025) lists curcumin among important supplements for PASC management. Preclinical evidence shows curcumin attenuates chronic fatigue syndrome in animal models, and the Holistic Primary Care post-viral protocol includes curcumin-containing herbal combinations.

D-Ribose is a five-carbon sugar that is the structural backbone of ATP and supports mitochondrial energy recovery specifically in post-viral fatigue contexts. A published integrative medicine review (Integrative Medicine Reports, Liebertpub, 2025) identifies D-ribose as exceptional at restoring pre-viral energy levels in post-COVID syndrome. Clinical evidence in ME/CFS and fibromyalgia (post-viral fatigue syndromes) shows improved fatigue and energy.

DHA is an omega-3 fatty acid essential for neurological recovery and inflammation resolution, serving as the precursor to D-series resolvins, protectins, and maresins. It is specifically included in the VA Long COVID protocol for post-viral recovery and is documented to support cognitive function and neurological recovery—targeting post-viral brain fog and neurological sequelae.

Echinacea (primarily E. purpurea and E. angustifolia) has been studied extensively for upper respiratory viral illness, with evidence supporting its role in reducing severity and duration of post-viral symptoms and supporting immune recovery. Preparations contain immunomodulatory alkylamides, polysaccharides, and caffeic acid derivatives. It is classified as a scientifically supported option for treatment and secondary prevention of viral respiratory infections.

Echinacea purpurea is the most clinically studied echinacea species, with multiple RCTs supporting its immunomodulatory and antiviral actions relevant to recovery from viral respiratory infections. It contains alkylamides and polysaccharides that modulate innate immune activation and suppress excessive cytokine release. Commission E and ESCOP recognize its use for supporting immune function in upper respiratory illness.

EGCG, the principal catechin of green tea, has antiviral activity against SARS-CoV-2 (inhibiting spike protein-ACE2 binding) and potent anti-inflammatory and antioxidant effects relevant to post-viral recovery. It is included in a post-COVID recovery formulation (MitoCore, Holistic Primary Care 2023 protocol) recommended for 90 days.

Elderberry (Sambucus nigra) has multiple randomized controlled trials and a 2021 systematic review supporting its ability to reduce the duration and severity of viral respiratory illness, including influenza, making it relevant to post-viral recovery. Meta-analyses confirm shortened illness duration, though evidence for prevention is weaker. Antiviral activity against influenza A and B has been shown in vitro and in human clinical trials.

Eleuthero (Eleutherococcus senticosus, Siberian ginseng) is an adaptogen with documented immunomodulatory activity and is specifically listed by the VA Long COVID clinical guide (2023) for fatigue and post-exertional malaise. A published observational study (PMC8420132) used an Eleuthero-containing supplement to significantly reduce post-COVID fatigue. Herbal medicine reviews identify it as one of few adaptogens with proven multitarget neuroendocrine-immune effects.

EPA is a specific omega-3 fatty acid that serves as the primary precursor to E-series resolvins and protectins—specialized pro-resolving mediators that actively terminate inflammatory cascades relevant to post-viral recovery. Post-viral protocols from the VA and integrative medicine reviews specify EPA as part of omega-3 recovery supplementation. EPA reduces the AA:EPA ratio inflammatory index reduced in the long COVID RCT.

Fisetin is a flavonol with senolytic, anti-inflammatory, and neuroprotective properties being investigated for long COVID. COVID-19 is associated with accelerated cellular senescence, and fisetin's senolytic activity (removing senescent cells) addresses a novel mechanistic target for post-viral recovery. Fisetin is under active clinical trial investigation for post-COVID sequelae.

Panax ginseng has multiple RCTs and a 2020 systematic review demonstrating anti-fatigue efficacy, and is specifically prescribed in long COVID treatment formulas as a 'monarch drug' in TCM-based recovery protocols. A 2024 systematic review confirmed ginseng and Astragalus as the most frequently used herbs for post-viral fatigue. The VA Long COVID guide (2023) includes Panax ginseng for fatigue and post-exertional malaise.

Ginsenosides are the primary bioactive saponins of Panax ginseng with documented anti-fatigue, immunomodulatory, and mitochondria-supporting effects. Clinical meta-analyses show ginsenoside-containing preparations significantly reduce fatigue biomarkers and improve fatigue scales vs. placebo. They have been mechanistically linked to enhanced ATP production and HPA axis modulation in post-viral recovery contexts.

Glycyrrhizin is the primary bioactive triterpene saponin of licorice root (Glycyrrhiza spp.) with documented antiviral activity against SARS-CoV, influenza, and other respiratory viruses. It is included in the 'positive' benefit-risk herbal assessment for COVID-19 respiratory recovery (ScienceDirect, 2021). Its anti-inflammatory and immunomodulatory actions are relevant to resolving post-viral inflammatory states.

Green tea (Camellia sinensis) contains EGCG and other catechins with antiviral, anti-inflammatory, and antioxidant properties relevant to post-viral recovery. It has been used in traditional East Asian medicine for recovery from illness and immune support for thousands of years. Modern evidence supports catechin-mediated antiviral activity against respiratory viruses including SARS-CoV-2.

Iron deficiency—including functional deficiency from post-viral inflammation-driven hepcidin elevation—is common in long COVID and contributes to fatigue and reduced exercise capacity. Clinical data show iron-deficiency anemia is prevalent in post-COVID patients and that iron supplementation or IV iron therapy significantly improves exercise tolerance and fatigue.

L-arginine combined with vitamin C has been specifically studied for post-COVID endothelial dysfunction in a published clinical protocol. The VA Long COVID guide (2023) includes L-arginine with vitamin C for endothelial dysfunction management. Integrative medicine reviews (Liebertpub, 2025) identify arginine and citrulline as important supplements for managing PASC symptoms.

L-carnitine supports mitochondrial fatty acid transport and ATP production, directly addressing the mitochondrial dysfunction underlying post-viral fatigue. Published integrative medicine reviews (Liebertpub, 2025; VA Long COVID guide) include carnitine in recommended PASC supplement protocols. Clinical data in ME/CFS (a post-viral condition) show L-carnitine improves fatigue scores and exercise tolerance.

L-Citrulline is an endogenous nitric oxide precursor that more efficiently raises plasma arginine than L-arginine itself by avoiding first-pass liver metabolism. Integrative medicine reviews (Liebertpub, 2025) list citrulline alongside arginine as important supplements for managing post-acute COVID-19 sequelae, particularly endothelial dysfunction and exercise intolerance.

L-glutamine is the most abundant amino acid in the body and is conditionally essential during viral illness and recovery, supporting intestinal barrier integrity and immune cell fuel. Integrative medicine reviews for long COVID recovery (Liebertpub, 2025) mention glutathione (synthesized from glutamine, cysteine, and glycine) as a key adjunctive supplement. L-glutamine supports gut barrier restoration impaired by SARS-CoV-2, addressing a key driver of post-viral systemic inflammation.

Viral infections—including SARS-CoV-2—are associated with marked depletion of glutathione, increased oxidative stress, and mitochondrial dysfunction that can persist post-infection. GlyNAC supplementation in persons with HIV (a chronic viral condition) corrected GSH deficiency, mitochondrial dysfunction, cognitive impairment, and physical decline in a clinical trial. Evidence in post-COVID contexts is emerging but mostly mechanistic.

Lactobacillus (Lactiplantibacillus) plantarum is specifically cited in a 2025 PMC systematic review (PMC12566607) as one of three probiotic species with clinical trial evidence for alleviating long-term COVID symptoms. It reinforces the intestinal epithelial barrier, competes directly with viral receptors, and modulates immune responses relevant to post-viral recovery.

Lactobacillus (Lacticaseibacillus) rhamnosus is one of three specific probiotic species identified in a 2025 PMC systematic review (PMC12566607) as having clinical trial evidence for alleviating long-term COVID-19 symptoms post-viral. It is one of the best-studied probiotic strains globally for immune modulation and gut barrier restoration.

Lactoferrin is an iron-binding glycoprotein with direct antiviral activity—it blocks viral entry into host cells, including SARS-CoV-2—and immunomodulatory properties relevant to post-viral recovery. A clinical study published in a peer-reviewed journal reported that lactoferrin supplementation in mild-to-moderate COVID-19 patients reduced disease duration and inflammatory markers.

Lentinan is the purified beta-1,3-glucan from shiitake mushroom (Lentinula edodes) with established clinical immunomodulatory activity and documented potential for recovery from COVID-19-related lung damage. It is approved as adjunct immunotherapy in Japan. A 2023 PMC review confirmed lentinan showed good potential for post-viral lung and immune recovery.

Licorice root (Glycyrrhiza glabra) has been given a 'positive' benefit-risk assessment for respiratory viral illness recovery in a systematic herbal medicine review (ScienceDirect, 2021). Its glycyrrhizin compound has documented antiviral activity against SARS-CoV and influenza, and it modulates adrenal function supporting post-viral fatigue and adrenal recovery. Traditional use in respiratory illness spans Ayurvedic, TCM, and European herbalism.

Lion's Mane (Hericium erinaceus) contains hericenones and erinacines that stimulate Nerve Growth Factor (NGF), supporting neural repair and addressing post-viral brain fog and cognitive decline. Solid clinical backing (studies from 2009 and 2023) confirms Lion's Mane extract at ~1 g/day over 16 weeks produces significant cognitive improvements. Post-viral recovery clinical protocols include Lion's Mane for neurological recovery.

Luteolin is a flavone with potent anti-inflammatory, antiviral, and neuroprotective properties studied in post-COVID brain fog and mast cell activation contexts. It inhibits SARS-CoV-2 entry, reduces microglial neuroinflammation, and stabilizes mast cells. Clinical data from a study in COVID-19 brain fog patients using luteolin-containing preparation showed significant symptom improvement.

Magnesium supports over 300 enzymatic reactions including energy production and mitochondrial function, both compromised in post-viral fatigue. Clinical studies of post-COVID patients show magnesium deficiency is common, and supplementation is included in evidence-based post-viral recovery protocols. EFSA has granted health claims for magnesium in reduction of tiredness and fatigue.

Maitake (Grifola frondosa) contains D-fraction beta-glucans that are among the most potent immune-activating polysaccharides from fungi, with clinical evidence for NK cell and T-cell activation. It is included in post-viral recovery mushroom complex formulations (RTHM, 2026) and has a long history in TCM as an immune tonic for recovery from illness.

Melatonin is specifically cited in multiple post-COVID clinical reviews for managing brain fog, pain, sleep dysregulation, oxidative stress, and immune dysregulation in long COVID. It reduces inflammatory cytokines (CRP, TNF, IL-6) as confirmed in a 2021 systematic review overview. The VA Long COVID guide and multiple integrative medicine reviews recommend melatonin for post-viral sleep and cognitive recovery.

Methylcobalamin is the neurologically active form of vitamin B12 that directly supports myelin synthesis and neurological recovery, particularly relevant to post-viral neuropathy and brain fog. Deficiency is documented in long COVID patients. Methylcobalamin is preferred in post-viral neurological recovery protocols for its superior CNS bioavailability versus cyanocobalamin.

NAC replenishes glutathione stores depleted during viral infection and post-viral inflammatory states, and is recommended in published long COVID treatment protocols. The VA Long COVID clinical guide (2023) and integrative medicine reviews (Liebertpub, 2025) include NAC for mitochondrial support and oxidative stress reduction. NAC has RCT evidence in viral respiratory illness contexts for reducing cytokine levels and symptom severity.

Nicotinamide riboside (NR) has been tested in a dedicated randomized controlled trial for long COVID (Lancet eClinicalMedicine, 2025; n=58), where it increased NAD+ within 5 weeks and showed exploratory within-group benefits in fatigue, sleep, and depressive symptoms at 10 weeks. NAD+ deficiency is documented in long COVID, and NR is classified as a form of Vitamin B3 under active clinical investigation for post-COVID recovery.

NMN is an NAD+ precursor with closely related mechanisms to nicotinamide riboside for post-viral mitochondrial recovery. Integrative post-viral recovery reviews (Liebertpub, 2025; Ayafusion citing research) include NMN as a NAD booster that supports energy production and reduces inflammation in long COVID. Clinical investigation is ongoing alongside NR.

Omega-3 fatty acids (EPA and DHA) have been tested in a registered RCT specifically for post-COVID recovery (NCT05121766), demonstrating safety and tolerability with a pronounced decline in inflammatory markers (AA:EPA ratio) in the supplemented group. They are recommended in published post-viral recovery protocols from both integrative medicine reviews and the VA Long COVID guide. EFSA recognizes their role in inflammatory regulation.

Palmitoylethanolamide (PEA) is an endogenous lipid mediator with anti-inflammatory, analgesic, and neuroprotective properties that has been specifically studied for long COVID symptoms including pain, fatigue, and brain fog. Multiple RCTs and clinical studies support PEA's efficacy in post-viral neurological and inflammatory conditions.

Phosphatidylcholine is the predominant phospholipid of cell membranes and the primary choline source for acetylcholine synthesis, supporting neurological function and liver health impaired in post-viral states. It is a key component of the phospholipid-based approaches to long COVID including LDN/LDH protocols. Liver membrane repair after COVID-19-induced hepatitis uses phosphatidylcholine.

Phosphatidylserine supports neuronal membrane integrity, cortisol regulation, and cognitive function—directly relevant to post-viral brain fog and HPA axis dysregulation. Clinical RCTs have demonstrated phosphatidylserine improves memory, processing speed, and cortisol normalization. Post-viral recovery protocols reference phosphatidylserine for neurocognitive recovery.

Propolis has been tested in an RCT as adjunct treatment for hospitalized COVID-19 patients and shown antiviral and immunomodulatory activity in both preclinical and clinical studies. A 2022 PMC systematic review confirmed propolis has broad-spectrum antiviral effects in vitro/in vivo and modulates cytokine production relevant to post-viral recovery. It has been proposed to reduce inflammatory processes by PAK1 inhibition.

Quercetin has been studied in several clinical trials for COVID-19 and early long COVID symptoms, with doses of 500–1500 mg/day associated with faster recovery, reduced inflammation, and improved viral clearance. It has demonstrated antiviral properties against multiple respiratory viruses by inhibiting viral proteases, polymerases, and reverse transcriptase. A 2020 PMC review proposed quercetin and vitamin C as a synergistic post-viral therapy.

Reishi mushroom (Ganoderma lucidum) is an adaptogen used in TCM for thousands of years for recovery from illness, immune modulation, and energy restoration. A 2023 RCT (n=126) found reishi-derived beta-glucans significantly increased immune cell populations. Its ganoderic acids act as mast cell stabilizers relevant to post-viral mast cell activation syndrome.

Resveratrol is a polyphenol stilbenoid with antioxidant and anti-inflammatory actions that has been included in post-viral recovery protocols and is under clinical trial investigation for long COVID. The VA Long COVID guide (2023) mentions resveratrol among supplements under clinical trial investigation. It activates SIRT1 and AMPK, supports mitochondrial biogenesis, and reduces NF-κB inflammatory signaling relevant to post-viral fatigue.

Rhodiola rosea has documented adaptogenic, anti-fatigue, and immunomodulatory activities with evidence from multiple clinical trials. It is specifically cited for helping with post-viral fatigue symptoms by the University of Wisconsin Integrative Health and in long COVID treatment reviews. Its active compounds salidroside and rosavins have antioxidant and anti-inflammatory actions relevant to post-viral recovery.

Schisandrins are the primary bioactive lignans of Schisandra chinensis, an adaptogen listed among adaptogens with proven multitarget effects on the neuroendocrine-immune system relevant to post-COVID-19 post-viral recovery. Traditional TCM use for recovery from illness, fatigue, and respiratory conditions spans centuries. Modern pharmacological evidence supports immunomodulatory and hepatoprotective effects relevant to post-viral recovery.

Selenium is an essential trace element with antioxidant and immunomodulatory roles, and clinical evidence supports its use in post-viral recovery. A 2021 post-COVID observational study found selenium-containing supplementation reduced fatigue and improved quality of life. A 2024 review confirmed selenium among the most promising trace elements for COVID-19 rehabilitation.

Serrapeptase (serratiopeptidase) is a proteolytic enzyme with anti-inflammatory, fibrinolytic, and mucolytic properties included in an RCT (PMC8472462) of systemic enzyme therapy for post-COVID fatigue. It reduces inflammatory mediators and fibrin deposition relevant to post-viral microclot pathology. Published post-viral recovery protocols include serrapeptase as a systemic enzyme.

Serratiopeptidase is the enzyme form of serrapeptase, explicitly tested in the 2021 RCT (PMC8472462) for post-COVID fatigue resolution showing significant improvement in fatigue and inflammatory markers. It has fibrinolytic, anti-inflammatory, and mucolytic mechanisms directly applicable to post-viral microclot and inflammatory burden.

Shiitake (Lentinula edodes) contains lentinan (a beta-glucan) and AHCC precursor compounds with documented immunomodulatory activity. A 2023 PMC review confirmed shiitake-derived beta-glucans show 'good potential for recovery' from COVID-19-related lung damage, and lentinan improves immune response in clinical settings.

Silymarin, the standardized flavonolignan complex from Milk Thistle, has Commission E and ESCOP monograph support for liver protection after viral hepatitis—a direct post-viral recovery indication. Clinical trials confirm it reduces liver enzyme levels and inflammatory markers in viral hepatitis contexts. COVID-19 causes hepatic inflammation in a majority of hospitalized patients, making silymarin directly relevant.

Specialized Pro-Resolving Mediators (SPMs) including resolvins, protectins, and maresins are derived from omega-3 fatty acids and actively resolve inflammatory states central to post-viral recovery. SPM-containing supplements and omega-3-derived SPM precursors are mechanistically documented to terminate post-viral inflammation without immunosuppression.

Sulforaphane is a bioactive isothiocyanate from broccoli that activates the Nrf2 antioxidant pathway, reducing oxidative stress and inflammation central to post-viral fatigue. It has shown activity against SARS-CoV-2 infection in preclinical studies and is included in post-COVID recovery formulations. Glucoraphanin (sulforaphane precursor) supplementation is part of published post-viral protocols.

Sulforaphane glucosinolate (glucoraphanin) is the stable precursor to sulforaphane found in broccoli sprout extracts, included in post-COVID recovery formulations. It activates Nrf2 antioxidant pathways upon conversion by gut microbiome myrosinase, supporting oxidative stress reduction and anti-inflammatory gene expression relevant to post-viral recovery.

Taurine is a conditionally essential amino acid with antioxidant, anti-inflammatory, and mitochondrial membrane-stabilizing properties relevant to post-viral recovery. Post-COVID fatigue recovery IV formulas include taurine alongside B vitamins, vitamin C, magnesium, and zinc. It supports cardiac function and autonomic nervous system regulation relevant to POTS in long COVID.

Turkey Tail (Trametes/Coriolus versicolor) contains polysaccharide-K (PSK) and polysaccharide-peptide (PSP), which are among the most clinically studied mushroom immunomodulatory compounds. It supports recovery of exhausted T-cells and NK cell activity, and is used in oncology as adjunct immunotherapy. Clinical evidence supports its role in immune exhaustion relevant to post-viral recovery.

Turmeric (Curcuma longa) is the source of curcumin and is included in post-viral recovery clinical protocols for its anti-inflammatory and immunomodulatory properties. A 2021 observational study of nutritional supplementation in post-COVID fatigue referenced turmeric-derived compounds. Post-viral recovery integrative protocols (Holistic Primary Care, 2023) include curcumin from turmeric as an anti-inflammatory component.

Vitamin A is essential for mucosal immunity, respiratory epithelial integrity, and immune cell differentiation—all compromised during and after viral respiratory infection. Post-viral fatigue clinics (Breakspear Medical) include vitamin A in foundational recovery supplementation. EFSA recognizes vitamin A for normal immune function and maintenance of mucous membranes.

Thiamine (Vitamin B1) is a critical coenzyme in mitochondrial energy metabolism, with deficiency linked to fatigue, neurological impairment, and dysautonomia—symptoms common in post-viral fatigue. Studies have found high-dose thiamine resolves post-viral fatigue in individual cases, and EFSA recognizes B1 for energy metabolism and neurological function.

Vitamin B12 (cobalamin) is essential for neurological function, energy metabolism, and red blood cell production—all compromised in post-viral fatigue. Studies have documented B12 deficiency in long COVID patients, and supplementation is included in published post-viral recovery protocols. EFSA health claims support B12 for reducing tiredness and fatigue.

Riboflavin (Vitamin B2) is an essential component of FAD and FMN coenzymes in the mitochondrial electron transport chain, and its deficiency impairs energy production relevant to post-viral fatigue. EFSA health claims support B2 for energy metabolism and reducing tiredness. It is included in post-viral recovery B-complex supplementation protocols.

Niacin (Vitamin B3) is the direct precursor to NAD+ and NADP+—coenzymes depleted in post-viral fatigue and central to mitochondrial energy production. EFSA has granted health claims for niacin in normal energy metabolism and reduction of tiredness and fatigue. The VA Long COVID guide (2023) highlights NAD+ restoration (via niacin forms including nicotinamide riboside) as a key post-viral recovery strategy.

Niacinamide (nicotinamide) is a non-flushing form of vitamin B3 that supports NAD+ production depleted in post-viral fatigue. It supports mitochondrial function, DNA repair via PARP enzymes, and sirtuin-mediated antioxidant defense. EFSA health claims support niacinamide for energy metabolism and fatigue reduction.

Pantothenic acid (Vitamin B5) is the precursor to Coenzyme A (CoA), essential for the citric acid cycle and fatty acid metabolism supporting post-viral mitochondrial energy recovery. EFSA health claims include B5 for normal energy metabolism and reduction of mental performance. It is included in B-complex post-viral recovery protocols.

Pyridoxal-5-phosphate (Vitamin B6 active form) is essential for neurotransmitter synthesis, immune cell function, and homocysteine metabolism—pathways impaired in post-viral fatigue and neurological sequelae. EFSA recognizes B6 for reducing tiredness and fatigue and normal immune function. It is included in post-viral recovery protocols.

Biotin (Vitamin B7) is an essential cofactor in carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid catabolism—all components of post-viral metabolic recovery. EFSA recognizes biotin for normal energy metabolism and normal neurological function. It is included in B-complex post-viral recovery protocols.

Folate (Vitamin B9) is essential for one-carbon metabolism supporting DNA synthesis, methylation reactions, and homocysteine clearance—all impaired in post-viral states. EFSA recognizes folate for reducing tiredness and fatigue, normal immune function, and normal psychological function. B9 deficiency is common in long COVID patients alongside other B vitamin deficiencies.

5-Methyltetrahydrofolate (5-MTHF) is the bioactive form of folate that bypasses MTHFR enzyme conversion, making it directly available for one-carbon metabolism, homocysteine clearance, and DNA methylation. It is preferred in post-viral recovery protocols for patients with MTHFR polymorphisms, who are overrepresented in post-viral fatigue populations.

Vitamin C has been directly studied for post-viral fatigue, with a 2021 systematic review (PMC8066596) identifying 9 clinical studies (720 participants) where high-dose IV vitamin C significantly reduced fatigue scores in 3 of 4 controlled trials. Its antioxidant, anti-inflammatory, and endothelial-restoring effects address key pathophysiological drivers of post-viral fatigue and long COVID. EFSA recognizes vitamin C health claims for reducing tiredness and fatigue.

Vitamin D deficiency is common in long COVID patients and has been linked to worse post-viral outcomes. Clinical studies show supplementation reduces inflammatory markers (CRP) and supports immune recovery. A systematic review confirmed 50,000 IU/month vitamin D showed efficacy in reducing CRP relevant to post-viral inflammation. Studies have found many post-COVID fatigue patients are deficient in vitamin D.

Cholecalciferol (vitamin D3) is the most bioavailable supplemental form of vitamin D and is specifically studied in COVID-19 and post-viral recovery contexts. It supports immune modulation and reduces inflammatory markers. Clinical protocols for long COVID from the VA and published integrative medicine reviews recommend vitamin D3 as part of post-viral recovery.

Vitamin E (primarily alpha-tocopherol) is a fat-soluble antioxidant that protects cell membranes and mitochondrial membranes from lipid peroxidation caused by viral-induced oxidative stress. It supports post-viral recovery as part of the antioxidant network alongside vitamins C and selenium. Post-viral recovery protocols reference vitamin E among antioxidants supporting mitochondrial membrane integrity.

Vitamin K (particularly K2) has been investigated in COVID-19 and post-viral recovery for its role in regulating elastic fiber proteins (Matrix Gla Protein) that protect against vascular and pulmonary calcification occurring post-virally. Post-viral recovery clinical protocols (Holistic Primary Care, 2023) specifically include vitamin K2 with D3 in structured 90-day recovery programs.

Wogonin is a bioactive flavone from Scutellaria baicalensis with documented anti-inflammatory and antiviral properties relevant to post-viral recovery. It inhibits NF-κB signaling, reduces NLRP3 inflammasome activation, and has shown activity against SARS-CoV-2 in molecular docking and in vitro studies.

Zinc is essential for immune cell function and antiviral defense, and clinical data show 50 mg/day elemental zinc reduces CRP in post-viral inflammatory states. Studies have found zinc deficiency common in long COVID patients. A 2024 PubMed review identified zinc among the most promising trace elements for COVID-19 rehabilitation, with clinical trials confirming reduced viral load with supplementation.

Cat's Claw (Uncaria tomentosa) is used traditionally in Amazonian medicine for immune restoration after illness and has documented immunomodulatory properties via pentacyclic oxindole alkaloids. It has been included in post-viral recovery clinical protocols for immune activation and anti-inflammatory effects. NCCIH recognizes its traditional use for immune support.

Chaga (Inonotus obliquus) has been used in traditional medicine since at least the 12th century for immune support and recovery from illness. It contains Inonotus obliquus polysaccharide (IOP) with documented anti-inflammatory and antioxidant activities relevant to post-viral recovery. It is included in post-viral recovery mushroom complex formulations (RTHM, 2026).

Chlorella, a green microalgae, has been included in integrative post-viral recovery protocols as a 'binder' to reduce toxin burden and provide nutritional support during recovery. An integrative medicine review (Liebertpub, 2025) cites 'broken cell chlorella' as an adjunctive supplement in long COVID protocols. It contains chlorophyll, vitamins, minerals, and immune-stimulating polysaccharides.

Dandelion (Taraxacum officinale) has traditional use in European, Native American, and Ayurvedic medicine as a liver tonic and post-illness recovery herb. It has anti-inflammatory, antioxidant, and hepatoprotective properties relevant to post-viral liver support. Some modern evidence supports its immunomodulatory and anti-inflammatory actions.

Elderberry has historical use for recovery from febrile and viral illness. A small open-label randomized multicentric trial assessed elderberry extract (Immunodaat) for post-COVID-19 recovery over 30 days. Outcomes included inflammatory markers and quality of life. Evidence is limited and preliminary.

Fenugreek (Trigonella foenum-graecum) has traditional use in Ayurvedic and Middle Eastern medicine as a restorative herb for recovery from illness, supporting appetite restoration, energy, and immune function. It contains 4-hydroxyisoleucine, saponins, and diosgenin with anti-inflammatory and immunomodulatory properties. Traditional convalescent use for post-fever weakness is well-documented.

Forsythia is a primary ingredient in classic TCM formulas used for post-febrile and viral recovery states. Its 'heat-clearing and detoxifying' role addresses residual heat patterns that TCM associates with post-viral lingering illness. The formula LHQW containing Forsythia was recommended for COVID-19 treatment in Chinese national guidelines. Preclinical evidence for antiviral activity is strong; isolated human trial data are limited.

Garlic (Allium sativum) has been used in traditional medicine globally for thousands of years for immune support and recovery from infectious illness. It is rated 'promising' in a systematic herbal medicine benefit-risk assessment for COVID-19 respiratory recovery (ScienceDirect, 2021). Its active compounds (allicin, ajoene, diallyl sulfide) have documented antiviral, antibacterial, and immunomodulatory properties.

Ginger (Zingiber officinale) is rated 'promising' in a systematic herbal medicine benefit-risk assessment for COVID-19 respiratory recovery (ScienceDirect, 2021). It contains gingerols and shogaols with anti-inflammatory, antiviral, and antinausea properties relevant to post-viral recovery. Traditional use globally for recovery from fever and respiratory illness spans millennia.

Gotu Kola (Centella asiatica) has centuries of traditional use in Ayurvedic and traditional Southeast Asian medicine for recovery from illness, nervous system support, and cognitive restoration. Its active triterpenoids (asiaticoside, madecassoside) have anti-inflammatory and neuroprotective effects. Some modern evidence supports its role in reducing neuroinflammation and fatigue-related cognitive symptoms.

Gypenosides are the primary bioactive saponins of Jiaogulan (Gynostemma pentaphyllum), structurally related to Panax ginseng ginsenosides, with adaptogenic, antioxidant, and immunomodulatory properties relevant to post-viral fatigue and immune recovery. They activate AMPK and support mitochondrial biogenesis.

Jiaogulan (Gynostemma pentaphyllum) is a traditional Chinese medicinal herb used for recovery from illness and fatigue, with adaptogenic properties similar to ginseng. It contains gypenosides structurally similar to ginsenosides and has documented immunomodulatory and antioxidant properties. Traditional use for post-illness weakness and immune support in Guizhou Province (China) is well-documented.

Milk Thistle (Silybum marianum) contains silymarin, a hepatoprotective flavonolignan complex used traditionally and clinically to support liver recovery after viral hepatitis—a direct post-viral application. Commission E and ESCOP monographs support its use for toxic liver damage and as adjunct in chronic inflammatory liver conditions. Post-viral liver involvement in COVID-19 has been documented.

Schizandrol A is a primary lignan of Schisandra chinensis, one of the adaptogens identified by HerbalGram/Herbal Reality (2021) as having multitarget effects on the neuroendocrine-immune system relevant to post-COVID recovery. Traditional TCM use for post-illness fatigue, respiratory recovery, and immune restoration has centuries of documentation.

Spirulina (blue-green microalgae) has been mentioned in integrative post-viral recovery literature as a binder and nutritional support supplement. An integrative medicine review (Liebertpub, 2025) cites spirulina among potential adjuncts in long COVID recovery, referencing its antioxidant, anti-inflammatory, and immune-modulating phycocyanin content. Traditional use as an immune and energy tonic is well-documented.