Dispepsia

Adzuki beans are a good source of dietary iron and are consistently used in East Asian food culture to support blood building, particularly for women. Iron is essential for hemoglobin synthesis and red blood cell production. The scientific basis is nutritional—iron content is documented—though dedicated anemia intervention trials are absent.

Amaranth seeds and leaves are a rich source of iron and are documented in clinical and observational research as supportive for preventing iron-deficiency anemia. A study showed regular amaranth consumption decreased anemia prevalence and increased hemoglobin levels in children. Copper content supports red blood cell production and iron metabolism.

Anchovies are a meaningful dietary source of iron (~3.3–4.63 mg/100 g, representing a substantial percentage of the RDA) as well as vitamin B12, both essential for red blood cell formation. Iron deficiency is the most common nutritional cause of anemia globally, and dietary heme iron from fish is well absorbed.

Ashwagandha (Withania somnifera) is an Ayurvedic adaptogen used for 'Pandu Roga' (anemia). An 8-week double-blind RCT found significant improvements in hemoglobin and hematological parameters. It supports bone marrow function and reduces inflammatory burden associated with anemia of chronic disease.

A clinical RCT of 60 patients with chronic aplastic anemia found astragalus injection added to standard care produced a significantly higher total effective rate (83.3% vs 66.7%, p<0.05) via immune modulation. In myelosuppressed anemic mice, astragalus injection promoted erythroid and megakaryocytic progenitor cell differentiation via antiapoptotic Bcl-XL upregulation.

Baobab's relevance to anemia is primarily through its role in enhancing non-heme iron absorption. A clinical study demonstrated an approximately 84% increase in iron absorption when baobab extract was consumed with a porridge meal, attributed to its high vitamin C content. Baobab also provides intrinsic dietary iron. Traditional use in Africa for anemia prevention is documented. No completed RCT has shown baobab supplementation to raise hemoglobin or ferritin in iron-deficient populations.

Beef provides highly bioavailable heme iron essential for hemoglobin synthesis, and animal meat promotes non-heme iron absorption. Dietary interventions with beef have been studied in women of reproductive age with iron deficiency, the primary nutritional cause of anemia.

Beetroot provides moderate amounts of iron and is among the richest vegetable sources of folate, both critical for red blood cell formation. Small human studies and animal models show increased hemoglobin and red blood cell counts after beetroot supplementation, particularly in iron-deficiency anemia.

Piperine enhances iron bioavailability by modifying intestinal epithelial cell membrane dynamics and stimulating brush border membrane enzyme activity, facilitating iron transport. A MDPI Nutrients (2020) review proposed piperine (BioPerine) as a potential adjunct in iron-deficiency management. Effect is indirect—as an absorption enhancer rather than an iron source.

Bovine heart is a source of both heme iron and vitamin B12, the two most critical nutrients for iron-deficiency and megaloblastic anemia. Heme iron bioavailability (25–30%) is substantially superior to non-heme iron. B12 from beef heart (~8.55 µg/100 g) addresses B12-deficiency anemia.

Bovine kidney supplies heme iron, vitamin B12, and selenium—three nutrients with well-characterized clinical roles in red blood cell formation. Deficiency in any of these can cause anemia. The dense co-occurrence of all three in a single food source is the scientific basis for bovine kidney's relationship to anemia support.

Bovine liver is one of the most concentrated dietary sources of heme iron, vitamin B12, and folate — three nutrients directly required for red blood cell synthesis. Heme iron from liver is more bioavailable than non-heme iron. B12 and folate deficiency both independently cause macrocytic anemia. Clinical and observational data support liver consumption for correcting iron-deficiency and megaloblastic anemia.

Catjang cowpea is a meaningful source of dietary iron and folate, and has been specifically studied for its role in combating iron deficiency anemia in developing countries. Iron bioaccessibility from cowpea varies by cooking method, with pressure cooking yielding up to ~44% bioaccessible iron. Folate content further supports red blood cell production.

Chickpeas are a significant source of non-heme iron, folate, and vitamin B6—micronutrients essential for erythropoiesis. Dietary studies and some clinical trials report improved haemoglobin levels and anemia markers with chickpea-enriched diets, particularly in nutritionally at-risk populations. Bioavailability of iron is limited by phytates but can be enhanced when co-consumed with vitamin C-rich foods.

Clinical evidence specifically in pregnant women shows chlorella supplementation reduces the incidence of anemia, attributed to its content of iron, folate, and vitamin B12. Direct evidence in non-pregnant populations with anemia is limited.

Chlorophyllin (sodium iron chlorophyllin) is a semi-synthetic chlorophyll derivative studied in Chinese clinical trials for iron-deficiency anemia. A phase IV multicenter RCT (31 hospitals in China) found significant hemoglobin increases in adults and children with IDA treated with chlorophyllin-based tablets. Also studied for renal anemia in hemodialysis patients.

Collard greens provide both iron and vitamin C in the same food, a combination that enhances non-heme iron bioavailability — vitamin C converts ferric to ferrous iron, which is absorbed more readily. They also provide folate, deficiency of which causes megaloblastic anemia. These nutritional roles are relevant particularly for plant-based dieters and pregnant women at risk of iron-deficiency anemia.

Copper is essential for iron absorption, hemoglobin synthesis, and red blood cell formation. Copper deficiency causes anemia (microcytic, normocytic, or macrocytic) and neutropenia. Oral copper supplementation rapidly corrects hematological manifestations; this is well-established in clinical case series and reviews.

Fava beans are rich in both iron (~10 mg/cup cooked) and folate, the two nutrients most commonly deficient in nutritional anemia. Both are required for normal erythropoiesis and hemoglobin synthesis. However, in individuals with G6PD deficiency, fava bean ingestion triggers hemolytic anemia (favism).

Severe or prolonged riboflavin (FMN/FAD) deficiency causes normocytic anemia by impairing iron absorption and hemoglobin synthesis. FMN deficiency disrupts the iron mobilization pathway. The NIH ODS confirms that anemia can develop with prolonged riboflavin deficiency and is reversible with supplementation.

Folic acid deficiency is a primary, well-established cause of megaloblastic macrocytic anemia, resulting from impaired DNA synthesis and disrupted red blood cell maturation in bone marrow. Folic acid has FDA approval for treating megaloblastic and macrocytic anemias due to folate deficiency. An umbrella review of intervention trials demonstrated a relative risk of 0.21 (95% CI: 0.11–0.38) for megaloblastic anemia with folic acid supplementation during pregnancy. Correct identification of folate versus B12 deficiency before supplementation is clinically essential, as folic acid can mask the hematological signs of B12 deficiency.

Folate deficiency impairs DNA synthesis in erythroid precursors, producing megaloblastic anemia. Folinic acid is an approved treatment for folate-deficiency megaloblastic anemia and is used as 'rescue' therapy in methotrexate-induced bone marrow suppression, restoring folate-dependent thymidine and purine synthesis without requiring DHFR activity.

Garbanzo beans provide approximately 4.7 mg of non-heme iron per cup cooked (~26% of the daily value), making them a meaningful plant-based iron source relevant to iron-deficiency anemia prevention. They also contain vitamin C, which enhances non-heme iron absorption, and folate, which is required for red blood cell maturation.

Hibiscus sabdariffa is documented in clinical literature as having antianemic properties. The calyces are rich in iron and vitamin C (which enhances iron absorption), and clinical use for anemia treatment is listed in systematic reviews of HS clinical trials. Traditional use across Africa includes HS consumption to treat anemia.

Preclinical research documents iron-deficiency anemia treatment as one of the pharmacological activities of Lablab purpureus. An animal study demonstrated a significant increase in hemoglobin and hematocrit levels following aqueous extract administration. The plant's seeds are also a rich natural source of dietary iron.

Iron is the cornerstone treatment for iron-deficiency anemia (IDA), the world's most common nutritional disorder. Oral iron supplementation (100–200 mg elemental iron/day) corrects hemoglobin deficits and replenishes stores. The American Gastroenterological Association recommends it as first-line therapy; hemoglobin typically rises ~2 g/dL within 4–8 weeks.

Isoleucine is required for hemoglobin synthesis, as it is an essential structural component of hemoglobin protein chains. Hemoglobin is notably low in isoleucine, meaning GI blood loss creates relative isoleucine deficiency that impairs erythropoietic protein synthesis. BCAA supplementation including isoleucine has been shown to increase hemoglobin and hematocrit in clinical populations.

Jujube is a recognized 'blood-nourishing' herb in TCM, used for blood deficiency for over 2,000 years. Cell and animal studies show jujube extract stimulates erythropoiesis via HIF-induced erythropoietin, supports heme iron recycling during erythrophagocytosis, and contains nutrients relevant to red blood cell production (vitamin C, iron, folate). No human RCTs for anemia specifically are available.

Kale provides non-heme iron alongside abundant vitamin C, which enhances non-heme iron bioavailability by reducing ferric iron to the more absorbable ferrous form. Kale's vitamin C content is well-documented, and the iron-vitamin C synergy for anemia prevention is supported by clinical RCTs. Kale is recognized as a dietary source of both iron and folate relevant to anemia prevention.

Kidney beans are a documented source of non-heme iron and folate, both critical for preventing iron-deficiency anemia and megaloblastic anemia. One cooked cup provides approximately 3–4 mg iron (~20% of adult daily requirement). Bioavailability of non-heme iron is enhanced by cooking and co-consumption with vitamin C.

In patients with end-stage renal disease on hemodialysis, dialysis-associated carnitine deficiency contributes directly to anemia. The NIH ODS states low carnitine levels in ESRD can contribute to anemia; L-carnitine supplementation has been used adjunctively with erythropoietin in hemodialysis patients to improve anemia parameters.

L-histidine is recognized as conditionally essential in uremia, where histidine deficiency contributes to anemia of chronic kidney disease. Supplementation in CKD and dialysis patients has produced measurable increases in hemoglobin levels, and combined IV iron plus histidine outperformed IV iron alone. Histidine-deficient diets also induce anemia in otherwise healthy subjects.

Multiple RCTs and a meta-analysis of four trials (600 pregnant women) confirm oral bovine lactoferrin improves hemoglobin, ferritin, and serum iron in iron-deficiency anemia, with fewer gastrointestinal side effects than ferrous sulfate. Benefit is also documented in non-pregnant women, IBD children, and anemia of chronic inflammation.

Lemon's vitamin C content enhances non-heme iron absorption by reducing ferric to ferrous iron in the gut, supporting hemoglobin synthesis and addressing iron-deficiency anemia indirectly. Clinical evidence supports vitamin C as an iron absorption enhancer, though the incremental hemoglobin benefit when added to iron supplements is modest.

Liquid liver fractions are a concentrated source of heme iron, which is absorbed via a distinct intestinal pathway with 2–3× greater efficiency than non-heme iron. Heme iron polypeptide (HIP), the purified form derived from animal liver/blood hemoglobin, has been tested in RCTs for iron-deficiency anemia. Evidence supports its ability to raise hemoglobin and iron indices, though effect sizes versus IV iron are modest. The high B12 and folate content also addresses nutritional megaloblastic anemia.

Mango's high vitamin C content significantly enhances absorption of non-heme iron from plant-based foods when consumed together, supporting prevention of iron-deficiency anemia. Vitamin C reduces ferric iron to the more absorbable ferrous form and counteracts dietary iron absorption inhibitors.

MeCbl is an established treatment for megaloblastic anemia arising from vitamin B12 deficiency. It is a required coenzyme for DNA synthesis in hematopoietic cells; deficiency leads to impaired red blood cell maturation and macrocytic anemia. MeCbl is approved and used clinically in Japan for megaloblastic anemia.

Multiple human studies demonstrate that pearl millet and other millets improve iron status, hemoglobin, and ferritin in anemic populations. A systematic review showed hemoglobin levels in adolescents rose from 10.8 (moderate anemia) to 12.2 g/dL (normal) with millet supplementation. Iron-biofortified pearl millet reduced anemia prevalence in children from 57.6% to 33.8% in an RCT.

Moringa oleifera leaves provide approximately 28 mg iron per 100 g dried powder, along with vitamin C and beta-carotene that enhance iron bioavailability. Multiple clinical studies in anemic adolescent girls and postpartum women demonstrate significant hemoglobin improvements with supplementation. Also used in Ayurveda as 'Shigru' for anemia.

Quinoa provides substantial iron, folate, and complete protein—the three primary nutritional determinants of non-hemolytic anemia. Clinical dietetic guidelines recommend quinoa for celiac patients with iron-deficiency anemia to restore micronutrient status on a gluten-free diet. Fermentation and germination increase iron and zinc bioavailability in quinoa. Folate content (~19% DV/cup) supports red blood cell maturation.

Spinach contributes both non-heme iron (for hemoglobin synthesis) and folate (for erythrocyte maturation) relevant to two distinct anemia types: iron-deficiency anemia and megaloblastic anemia. Bioavailability of spinach iron is low without vitamin C co-ingestion. Folate from spinach is well-absorbed and prevents folate-deficiency megaloblastic anemia.

Spirulina (Arthrospira platensis) is a blue-green cyanobacterium rich in iron, B vitamins, phycocyanin, and cofactors supporting red blood cell production. Multiple clinical studies including RCTs in elderly patients, children, and adults with ulcerative colitis demonstrate improved hemoglobin and anemia parameters with supplementation.

Strawberries are a rich source of vitamin C, which markedly enhances non-heme iron absorption from plant foods when consumed simultaneously—a well-established mechanism for reducing iron-deficiency anemia risk. Vitamin C deficiency itself can cause anemia through impaired collagen synthesis and reduced iron absorption. Strawberries do not contain therapeutic levels of iron but act as absorption enhancers.

A double-blind, placebo-controlled human study (cited in a 1995 US patent) found that suma root at 1,000 mg three times daily for three months improved hemoglobin levels and inhibited red blood cell sickling in sickle cell anemia patients. A 2015 clinical hemorheology study also reported improved RBC deformability in sickle cell patients with P. paniculata extract.

T. cordifolia has been studied for inflammation-associated anemia: a preclinical study (PubMed 31358831) showed it modulates inflammatory cytokines and hepcidin expression to protect against anemia. In HIV models, TCE improved hemoglobin percentage by stimulating immune cells. Ayurvedic texts also list anemia as a traditional indication.

Vanillin has been specifically studied as an antisickling agent for sickle cell disease (sickle cell anemia). A seminal 1991 Blood journal study by Abraham et al. showed vanillin covalently binds sickle hemoglobin, dose-dependently inhibiting cell sickling. A small clinical study showed vanillin 1 g/day over 40 days reduced sickled red blood cells in 30 patients. This is specific to sickle cell anemia, not other anemia types.

Vitamin A plays a critical role in iron mobilization from liver and spleen stores and in supporting erythropoiesis. Vitamin A deficiency anemia does not respond to iron alone; combined vitamin A and iron supplementation shows markedly greater anemia reduction than iron alone.

Vitamin B12 (cobalamin) deficiency is a leading cause of megaloblastic macrocytic anemia. Deficiency impairs DNA synthesis in erythroid precursors, producing large, abnormal red blood cells. Supplementation or intramuscular injection corrects megaloblastic anemia; pernicious anemia requires lifelong repletion.

Riboflavin (vitamin B2) affects iron absorption and metabolism; inadequate intake is independently associated with increased risk of iron-deficiency anemia. A large 5-year prospective Chinese cohort study (n=1,253) found low riboflavin intake predicted anemia risk at follow-up. Riboflavin supports iron mobilization and red blood cell formation.

Vitamin B6 (pyridoxine) is a cofactor for δ-aminolevulinic acid synthase (ALAS2), the rate-limiting enzyme in heme biosynthesis. Deficiency causes sideroblastic anemia. Hereditary X-linked sideroblastic anemia (ALAS2 mutations) responds to pyridoxine at 50–500 mg/day; acquired idiopathic forms generally do not.

Folic acid (folate/vitamin B9) deficiency is a leading cause of megaloblastic macrocytic anemia. Folate is essential for DNA synthesis in erythroid precursors; deficiency produces abnormally large, poorly developed red blood cells. Supplementation corrects folate-deficiency megaloblastic anemia within weeks.

5-Methyltetrahydrofolate (5-MTHF) is the bioactive circulating form of folate directly usable for DNA synthesis without requiring liver conversion. It corrects folate-deficiency megaloblastic anemia and is preferred in individuals with MTHFR polymorphisms impairing folic acid metabolism.

Vitamin C (ascorbic acid) enhances non-heme iron absorption by reducing ferric to ferrous iron in the gut and supports iron mobilization from stores. Co-administration with oral iron is widely recommended to improve absorption in iron-deficiency anemia. Vitamin C deficiency is directly associated with significant anemia.

Vitamin E has documented clinical evidence in hemolytic anemias associated with oxidative erythrocyte damage, particularly G6PD deficiency and beta-thalassemia. High-dose vitamin E has been shown in published clinical studies to improve erythrocyte survival by protecting red blood cell membranes from oxidative destruction.

Multiple clinical studies in beta-thalassemia patients show wheatgrass juice or tablets can reduce blood transfusion requirements and maintain or raise fetal hemoglobin (HbF) levels. A pilot study found a 29.5% increase in mean transfusion interval. A randomized prospective trial in 69 thalassemic children confirmed maintenance of serum ferritin and increased HbF.

Alfalfa contains iron, vitamin K, and chlorophyll—nutrients associated with blood cell production—and is traditionally used for anemia and convalescence. One human study found alfalfa ethanolic extract may improve serum iron. Traditional use for anemia is documented in multiple herbal medicine systems.

Dried apricots are traditionally recommended as a dietary intervention for iron-deficiency anemia due to their non-heme iron content (~2.7–6.0 mg per 100 g depending on variety). The co-presence of vitamin C in fresh apricots enhances non-heme iron absorption. Beta-carotene (provitamin A) may also support iron mobilization from tissue stores. This is a nutritional/dietary tradition rather than a pharmacological one.

Asparagus officinalis is a notable dietary source of folate and contains iron; adequate folate is essential for normal erythropoiesis and prevention of megaloblastic anemia. Traditional use includes asparagus as a blood tonic. No clinical evidence for asparagus supplementation as an anemia treatment exists.

Traditional apitherapy and multiple pharmacological reviews cite bee pollen as capable of increasing hemoglobin, red blood cell counts, and iron levels, with applications for pernicious anemia. Scientific evidence is drawn from traditional and pharmacological literature rather than controlled human trials.

Bovine spleen is among the most concentrated food sources of heme iron, which is essential for hemoglobin synthesis and addressing iron-deficiency anemia. Traditional healers directed spleen consumption at blood and anemia-related conditions. While heme iron bioavailability is clinically established, no human trials specifically test bovine spleen supplements as an anemia intervention.

Chlorophyll's structural similarity to hemoglobin—both are tetrapyrrole ring structures, with magnesium at the center of chlorophyll versus iron in heme—has led to the traditional belief that chlorophyll-rich preparations support red blood cell production and may assist in anemia. Wheatgrass (rich in chlorophyll) has been used as an adjuvant in thalassemia and hemolytic anemia in small case series, but controlled human evidence for isolated chlorophyll supplementation improving anemia is lacking.

Cumin's high iron content (approximately 20% of daily recommended intake per teaspoon) underpins its traditional use for anemia. Multiple traditional medicine systems recommend cumin to support hemoglobin production. No clinical trials have evaluated cumin specifically as a treatment for diagnosed anemia.

Dandelion (Taraxacum officinale) greens are iron-rich (3.1 mg/3.5 oz, more than spinach) and have been used in Traditional Chinese Medicine and Western herbalism for anemia. A small animal study found dandelion extract significantly increased hemoglobin and red blood cell count. No quality human clinical trials have been conducted specifically for anemia.

Dong quai (Angelica sinensis) is the primary blood tonic herb in Traditional Chinese Medicine, used for over 2,000 years for blood deficiency (anemia-like states). It is a key ingredient in classic formulas (Si Wu Tang, Ba Zhen Tang) shown in systematic reviews of RCTs to raise hemoglobin. Isolated dong quai evidence is limited; formula-level evidence is emerging but methodologically mixed.

Dulse has a long traditional use for correcting iron-deficiency anemia, justified by its high iron content—up to 35–50 mg iron per 100 g dried dulse. Traditional herbalists in Ireland, Scotland, and Atlantic Canada recommended it for anemia. The iron in dulse is accompanied by vitamin C (which enhances non-heme iron absorption) and vitamin B12 (relevant to megaloblastic anemia). No clinical trials have formally tested dulse as an anemia intervention.

Fulvic acid has traditional folk medicine use for anemia. It chelates iron into bioavailable complexes, potentially improving iron absorption through multiple pathways including endocytosis. Agricultural and in vitro studies support enhanced mineral bioavailability, but human anemia trials are not published.

Gentiana species in the Gentianaceae family, particularly Swertia chirayita, have traditional use for anemia and blood purification in Ayurvedic and South Asian medicine, documented in a PMC systematic review. G. scabra in Chinese medicine is used for conditions involving blood quality. No clinical or mechanistic studies on gentian for anemia have been published.

Traditional Ayurvedic and folk medicine use amla to 'purify the blood' and treat anemia, primarily attributed to its high vitamin C content enhancing non-heme iron absorption. PMC literature lists blood purification as a traditional use.

GMT's traditional use specifically includes anemia prevention and treatment, listed in multiple peer-reviewed phytochemical reviews and the 2023 systematic monograph. Its common name 'ironwort' has been partly linked to traditional associations with iron-related blood strengthening. No clinical evidence from human trials on anemia is available.

Guggul formulations such as Singhnad Guggulu are traditionally indicated for anemia in Ayurvedic practice. Guggul is considered a Raktashodhaka (blood purifier), and Vatari Guggulu has been shown in animal studies to increase hemoglobin and RBC counts in arthritic rats.

Gymnema sylvestre is documented in traditional pharmacological literature as a historical remedy for anemia, included among its listed Ayurvedic indications. No mechanistic explanation or clinical trials supporting this use have been found.

Traditional Ayurvedic texts classify T. cordifolia as a 'blood purifier' (Raktashodhaka) used for anemia. A preclinical study (PubMed 31358831) showed T. cordifolia significantly raised hemoglobin and RBC count in inflammation-associated anemia in Wistar rats by modulating hepcidin expression and inflammatory cytokines. Human clinical data are not available.

Isoleucine is documented in biochemistry and nutrition references as essential for hemoglobin synthesis, as it forms part of the polypeptide chain structure of hemoglobin. Adequate isoleucine is therefore considered necessary for red blood cell formation and recovery from blood loss. However, no human clinical trials specifically testing isoleucine supplementation in anemic populations have been identified.

Morus fruit (Sang Shen) has been used in TCM for centuries to 'nourish blood' and treat conditions corresponding to blood deficiency or anemia. The iron content of mulberry fruit and TCM blood-tonifying indications support this traditional use, though no clinical RCTs for anemia endpoints exist.

Stinging nettle (Urtica dioica) has been used for over 2,000 years as a blood-building remedy for iron-deficiency anemia. Its leaves are rich in iron and vitamin C (enhancing non-heme iron absorption). The American Botanical Council documents use by midwives to treat anemia in pregnant women. No large human RCTs confirm clinical efficacy specifically for anemia.

Parsley is traditionally used to treat anaemia across multiple cultures, supported by its high iron content (~6.2 mg/100 g) and very high vitamin C content which enhances non-haem iron absorption. The ethnopharmacological literature lists anti-anaemic properties as a documented traditional use.

Punarnava Mandur, the classical Ayurvedic iron-based formulation with punarnava as its principal ingredient, is specifically prescribed for anemia (Pandu roga), splenomegaly, and related blood disorders. Punarnava's Ayurvedic synonym 'Panduhara' means 'remover of Pandu (anemia/pale complexion).' A preclinical blood glucose study noted incidental increases in total hemoglobin in treated animals.

Anemia is listed as a traditional indication for red root in 19th-century herbal and homeopathic literature, understood through the herb's relationship with the spleen as a blood-filtering and red cell-regulating organ. The most direct evidence is a preliminary human study in thalassemic patients (a hemolytic anemia) that found improvements in hemoglobin-related parameters. Evidence remains very limited.

Rehmannia (especially the prepared form Shu Di Huang) has been used as a 'blood tonic' in TCM for over two millennia, specifically for blood deficiency states presenting as pallor, fatigue, dizziness, and palpitations analogous to anemia. It is the chief herb in the classical blood-building formula Si Wu Tang. Modern network pharmacology research has also mapped RG compounds to anemia-related protein targets.

Rehmannia is one of the principal Chinese blood-tonifying herbs with a long history of use for anemia, including aplastic anemia. Clinical reports from China describe prepared rehmannia polysaccharide use in aplastic anemia treatment. It is thought to stimulate erythropoietin and hematopoiesis.

Anemia is a traditionally documented indication for Rhodiola rosea across Russian, Scandinavian, and Central Asian folk medicine. No controlled human clinical trials have evaluated Rhodiola specifically for anemia or hematological endpoints. The traditional basis is cross-referenced in multiple herbal monographs.

Rosa californica hips are a traditional dietary source of vitamin C, which is recognized to enhance non-heme iron absorption from plant-based foods. This property has been noted in the context of rose hips broadly across the Rosa genus, and traditional dietary use of the hips supported general nutritional health.

Anemia is one of the traditional indications of Swertia chirayita documented in Ayurvedic texts and ethnopharmacological reviews. The herb is used for blood purification and strengthening the blood. No clinical or experimental hematological studies confirming this effect for Swertia specifically have been identified.

Watercress has been traditionally used for anemia in Roman, Greek, Persian, and later European and Middle Eastern traditions. It contains notable amounts of iron and vitamin C, which enhances non-heme iron absorption. Historical use is documented in PMC-indexed reviews. No clinical RCT specifically for anemia endpoints has been published.

Nutritional yeast (especially fortified forms) is used to prevent nutritional anemia due to its folate (B9) content, which is essential for red blood cell DNA synthesis and maturation. Unfortified brewer's yeast does not contain B12, but fortified nutritional yeast provides B12 and is used by vegans to prevent megaloblastic anemia. The link is based on nutritional biochemistry rather than yeast-specific clinical trials.

Yellow dock (Rumex crispus) root has been used by European herbalists since medieval times as a primary remedy for iron-deficiency anemia. It contains vitamin C (enhancing non-heme iron absorption) and tannins stimulating liver bile production supporting iron metabolism. No quality human RCTs confirm efficacy specifically for anemia.