Airborne Vitamin C | Time Release Immune Support

Name: Vitamin C (1000 mg, Time Release)
Brand: Nature's Sunshine
SKU: 3240
Price: 35.70 USD
Availability: InStock
Rating: 4.8 (5 reviews)

Discover how airborne Vitamin C with Rose hips, bioflavonoids & time-release delivery supports immune health, antioxidant defense & collagen production daily.

What It Is

Airborne Vitamin C: Time-Release Immune Support That Works All Day

When you think of airborne Vitamin C, you're thinking of consistent, sustained immune nourishment — the kind your body can actually use throughout the day. Nature's Sunshine Vitamin C Time Release was designed with exactly that philosophy. Each tablet delivers 1,000 mg of Vitamin C (ascorbic acid) blended with a synergistic base of Rose hips extract, acerola fruit extract, Rutin, Lemon bioflavonoid extract, and Hesperidin bioflavonoid extract.

What sets this formula apart is its special time-release coating. Rather than flooding your system with a single burst of Vitamin C — much of which would pass through unabsorbed — the coating slows nutrient release until the tablet reaches the intestines. Research shows that approximately 70–90% of usual dietary Vitamin C intakes are absorbed, but absorption falls to about 50% or less with increasing doses above 1 g/day. Time-release delivery helps address this by extending the absorption window.

This is a completely natural product with no sugar, starch, artificial colorings, or flavorings. It's also vegan and non-GMO, making it a clean choice for health-conscious individuals who want reliable airborne Vitamin C protection every day.

Why It Matters

Why Daily Vitamin C Matters for Immune Health and Beyond

Vitamin C is an essential nutrient that your body cannot manufacture on its own, due to mutations in the L-gulonolactone oxidase (GLO) gene. That means you must get it through diet or supplementation — every single day. Because Vitamin C is water-soluble, the body doesn't store it, making consistent intake especially important.

Research suggests Vitamin C plays a well-documented role in supporting both innate and adaptive immune function. It helps maintain epithelial barrier function against pathogens, enhances the differentiation and proliferation of B cells and T cells, promotes phagocytosis, normalizes cytokine production, and decreases histamine levels. During infection, plasma Vitamin C concentrations decline rapidly, reinforcing the value of steady daily replenishment.

Beyond the immune system, Vitamin C is a potent water-soluble antioxidant that scavenges reactive oxygen species and can regenerate other antioxidants such as vitamin E. It also serves as a required cofactor for collagen biosynthesis — without adequate Vitamin C, the body cannot properly hydroxylate collagen precursors, which affects skin integrity, wound healing, and connective tissue strength.

If you have questions about whether a Vitamin C supplement is right for your individual needs, our naturopath is available for a free consultation to help guide you.

What's inside

Key ingredients

Vitamin C (ascorbic acid) — 1,000 mg

The cornerstone of this formula, Vitamin C (ascorbic acid) is a water-soluble antioxidant and enzymatic cofactor involved in numerous biological functions. As an antioxidant, it directly scavenges reactive oxygen species in aqueous cellular compartments and plasma, and research demonstrates it can regenerate the antioxidant form of vitamin E at membrane interfaces. Multiple human trials show supplementation raises antioxidant capacity and reduces biomarkers of oxidative damage. For immune health, a Cochrane review of 29 trials involving over 11,000 participants found that regular Vitamin C supplementation modestly reduces the duration of colds (8% in adults, 14% in children) and may reduce severity, with more pronounced benefits in people under severe physical stress such as marathon runners. Vitamin C supports the respiratory system by acting as a key antioxidant throughout the respiratory tract, and clinical evidence suggests supplementation at ≥400 mg/day may improve FEV1% in patients with chronic obstructive pulmonary disease. It also plays an essential role in collagen biosynthesis — without it, prolyl and lysyl hydroxylase enzymes cannot properly hydroxylate collagen precursors, affecting skin, bone, cartilage, and wound repair. Additionally, Vitamin C improves the absorption of non-heme iron by reducing ferric iron (Fe³⁺) to the more absorbable ferrous form (Fe²⁺) in the gastrointestinal tract.

Rose hips — 25 mg

Rose hips (Rosa canina) are among the richest natural sources of Vitamin C, with concentrations reported as high as 1,300 mg/100 g, and they deliver a broad spectrum of antioxidant compounds including polyphenols, carotenoids (lycopene, beta-carotene), tocopherols, and flavonoids. Rose hip extract ranks among the highest measured antioxidant activities of tested fruits by ORAC, TRAP, and HORAC assays, and clinical studies confirm increased antioxidant status in healthy adults following supplementation. For immune support, the Vitamin C in Rose hips supports white blood cell production and function, while polyphenols and carotenoids provide additional immunomodulatory support. Research suggests Rose hips support upper respiratory health primarily through their Vitamin C content — meta-analyses of Vitamin C supplementation confirm 8–14% reduction in cold duration — and anti-inflammatory flavonoids, including quercetin, may soothe airway mucous membranes. Rose hips have been used traditionally for centuries as a cold-season immune staple, with Scandinavian nypon (rose hip) soup remaining a winter tradition still commercially produced in Sweden today.

acerola fruit extract — 25 mg

Acerola (from the Cherry family) is a concentrated source of anthocyanins and polyphenolic compounds that contribute to strong antioxidant activity. Research suggests tart Cherry anthocyanins upregulate endogenous antioxidant pathways, including Nrf2/ARE, and human RCTs show increased DNA repair enzyme (OGG1) activity and reduced oxidative stress markers such as MDA and oxidized LDL following supplementation. For immune support, Cherry anthocyanins modulate immune-inflammatory signaling by inhibiting COX-1/2 and NF-κB, reducing TNF-α, IL-1β, and IL-6 in human studies. RCTs also demonstrate reduced C-reactive protein at rest in older adults, reflecting meaningful immune system modulation.

Rutin — 25 mg

Rutin (quercetin-3-O-rutinoside) is a flavonoid glycoside found in buckwheat, citrus fruits, and many other plants. It is a powerful antioxidant documented through multiple mechanisms: direct free-radical scavenging, upregulation of endogenous antioxidant enzymes (SOD, CAT, GPx), and activation of the Nrf2/ARE pathway. Preclinical evidence consistently shows reductions in oxidative stress biomarkers such as MDA and ROS. Rutin modulates multiple arms of immunity — it suppresses pro-inflammatory cytokine production from macrophages, inhibits mast cell activation relevant to allergic immunity, modulates Th1/Th2 balance, and exerts NF-κB-dependent immunomodulatory effects. Research also suggests Rutin may inhibit mast cell histamine release, and it has been noted for its mast cell-stabilizing and histamine-suppressing mechanisms. As a quercetin glycoside, Rutin is hydrolyzed by colonic bacteria to release quercetin, the biologically active aglycone.

Hesperidin bioflavonoid extract — 25 mg

Hesperidin is a flavanone glycoside predominantly found in citrus fruits, particularly orange and Lemon peels. It acts as a prodrug for hesperetin, its active aglycone, released after hydrolysis by gut microflora. Research suggests Hesperidin provides antioxidant benefits via enhanced activity and production of cellular antioxidant enzymes such as superoxide dismutase (SOD), heme oxygenase-1 (HO-1), catalase, and elevation of glutathione, and it activates the ERK/Nrf2 signaling pathway. These effects have been demonstrated in vitro, in animal studies, and in human RCTs measuring oxidative stress biomarkers. For immune modulation, Hesperidin has been shown to downregulate pro-inflammatory cytokines (TNF-α, IL-1β, IL-4, IL-6, IL-8, IL-12) and upregulate anti-inflammatory IL-10, inhibit NF-κB, and modulate leukocyte function. A human RCT showed a Hesperidin-containing supplement improved immune function in adults. Hesperidin also exhibits anti-allergic properties by inhibiting mast cell degranulation and reducing histamine release.

Lemon bioflavonoid extract — 25 mg

Lemon bioflavonoids are a complex of flavonoids naturally present in Citrus × limon, including Hesperidin, eriocitrin, and naringenin. Research suggests Lemon is a well-characterized source of antioxidant compounds — a double-blind RCT found that citrus extract combined with Vitamin C significantly increased lipoprotein oxidation lag time, outperforming vitamin E as an antioxidant. For immune support, Lemon's Vitamin C content contributes to natural killer cell activity, lymphocyte proliferation, neutrophil function, and interferon production. A clinical review found Vitamin C intake improved symptoms and shortened duration of respiratory tract infections including the common cold. Lemon's principal flavonoid, Hesperidin, has also shown computational and in vitro evidence of antiviral activity relevant to immune defense.

dicalcium phosphate

Dicalcium phosphate is included as a tableting aid and a source of both Calcium and phosphorus. Calcium is the most abundant mineral in the human body, with over 99% stored in bone as hydroxyapatite. Beyond structural support, Calcium is widely involved in cell signaling, muscle contraction, and neuronal transmission. In this formula, dicalcium phosphate contributes to the tablet's structural integrity while providing a small amount of bioavailable Calcium.

Vitamin C (1000 mg, Time Release)

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Vitamin C (1000 mg, Time Release)

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Who It's For

Who Benefits from Airborne Vitamin C Support

This airborne Vitamin C formula is designed for adults seeking daily immune support, antioxidant defense, and collagen nourishment in a single, convenient tablet. Because Vitamin C is water-soluble and not stored in the body, daily replenishment matters for everyone — but certain groups may benefit especially.

If you're looking to support your immune system during cold and flu season, research suggests regular Vitamin C supplementation modestly reduces cold duration and severity. People under physical stress — such as athletes, active individuals, or those with demanding schedules — may see more pronounced benefits, as studies show greater protective effects in populations under heavy physical or cold stress.

This formula is also well-suited for those who want antioxidant defense against everyday oxidative stress, as well as anyone focused on skin health and tissue integrity, since Vitamin C is essential for collagen production. The vegan, non-GMO formulation makes it accessible for a wide range of dietary preferences.

If you're unsure whether this product fits your specific health goals, we encourage you to take advantage of our free naturopathic consultation — our naturopath can help you find the right fit.

How To Take

How to Take This Time-Release Vitamin C

Take one tablet daily with a meal. The time-release coating is specifically designed to slow absorption until the nutrients reach the intestines, helping your body access the Vitamin C and bioflavonoids gradually throughout the day rather than in a single burst.

Each bottle contains 120 tablets, providing a four-month supply at the recommended one-tablet-per-day serving.

About the author

Written by Greg Howlett

Greg Howlett

Founder

Greg has spent over a decade helping customers choose the right natural-health products. He personally vets every formula we carry and writes these guides to cut through the marketing noise with practical, experience-based advice.

FAQ

Frequently asked questions

How does the time-release coating work in this airborne Vitamin C formula?

Each tablet includes a special coating that slows the absorption of nutrients until they reach the intestines. This time-release design is intended to provide the benefits of Vitamin C throughout the day, rather than delivering a single large dose that may not be fully absorbed. Research indicates that absorption of Vitamin C can fall to about 50% or less with increasing doses above 1 g/day, so the extended-release approach helps your body make better use of the full 1,000 mg dose.

Can Vitamin C actually help prevent colds?

According to a Cochrane review of 29 trials involving more than 11,000 participants, regular Vitamin C supplementation does not reduce the incidence of colds in the general population. However, the same body of evidence found that regular supplementation modestly reduces cold duration (by about 8% in adults and 14% in children) and may lessen severity. Benefits are more pronounced in people exposed to severe physical stress, such as marathon runners or military personnel.

Why are bioflavonoids like Rutin and Hesperidin included alongside Vitamin C?

The Vitamin C in this formula is blended with a base of Rose hips extract, acerola extract, Rutin, Lemon bioflavonoids, and Hesperidin complex. These bioflavonoids are plant-derived antioxidant compounds that complement Vitamin C's activity. Research suggests Rutin and Hesperidin support antioxidant defense and modulate immune-inflammatory pathways, while Rose hips and Lemon bioflavonoids provide additional Vitamin C and a broad spectrum of polyphenols.

Is this Vitamin C formula vegan and suitable for sensitive diets?

Yes. This formula is vegan and non-GMO. It is also a completely natural product with no sugar, starch, artificial colorings, or flavorings, making it appropriate for people who prefer clean supplementation.

What roles does Vitamin C play beyond immune support?

Vitamin C is a required cofactor for collagen biosynthesis — supporting skin, bone, cartilage, and wound repair. It also functions as a potent water-soluble antioxidant that fights free radicals and nourishes tissues. Additionally, Vitamin C improves the absorption of non-heme iron from plant-based foods by converting ferric iron to the more absorbable ferrous form, which is relevant for people relying on plant-based diets.

Can your naturopath help me decide if this formula is right for me?

Absolutely. We offer free naturopathic consultations, and our naturopath can review your individual health goals and dietary needs to help you determine whether this airborne Vitamin C formula — or another approach — is the best fit for you. No membership or commitment required.

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