Vitamin C for Kids | Immune & Antioxidant 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)

Learn about Vitamin C for kids: how it supports immune health, fights free radicals, and nourishes growing tissues. Explore ingredients, benefits, and FAQs.

Essential Nutrient

Vitamin C for Kids: Why It Matters

Vitamin C is a water-soluble nutrient the body cannot produce on its own, making dietary or supplemental intake essential at every stage of life — especially during childhood. As a potent antioxidant and cofactor for numerous enzymes, Vitamin C is involved in many biological functions, including normal immune system functioning, collagen biosynthesis, iron absorption from plant-based foods, and carnitine and catecholamine metabolism.

For parents exploring Vitamin C for kids, understanding how this nutrient works can help ensure children receive adequate support for growing bodies. Vitamin C contributes to immune defense by supporting various cellular functions of both the innate and adaptive immune system. It supports epithelial barrier function against pathogens and promotes the oxidant scavenging activity of the skin, thereby potentially protecting against environmental oxidative stress.

Research suggests that regular Vitamin C supplementation reduces common cold duration by 14% in children (compared to 8% in adults), according to a large review of 82 studies. That notable difference highlights how important consistent Vitamin C intake can be for younger immune systems. Vitamin C supports physical barriers, innate immunity, and adaptive immune responses — all critical components of a child's developing defenses.

How It Works

A Time-Release Formula with Bioflavonoid Support

Nature's Sunshine Vitamin C Time Release is designed to deliver the powerful benefits of Vitamin C throughout the day. Each tablet includes a special coating that slows the absorption of the nutrients until they reach the intestines, supporting steady, sustained nutrient delivery rather than a single burst.

This is a completely natural product with no sugar, starch, artificial colorings, or flavorings. The Vitamin C in this formula is blended with a base of Rose hips extract, acerola extract, Rutin, Lemon bioflavonoids, and Hesperidin complex — plant-derived compounds that complement Vitamin C's activity in the body.

This product is both vegan and non-GMO, making it a straightforward choice for families seeking a clean-label supplement. It supports the immune system, fights free radicals, nourishes the tissues, and assists in the production of collagen — a protein required to help wounds heal and maintain the structure of skin, bones, and connective tissue.

What's inside

Key ingredients

Vitamin C (ascorbic acid) — 10000 mg

Vitamin C (ascorbic acid) is a water-soluble antioxidant and essential cofactor for enzymes involved in collagen biosynthesis, carnitine synthesis, neurotransmitter production, and iron absorption. It functions physiologically by scavenging reactive oxygen species in aqueous environments and can regenerate other antioxidants such as vitamin E. Research suggests that Vitamin C plays a well-documented role in supporting immune function: it accumulates in leukocytes, supports phagocytosis and chemotaxis, and is rapidly consumed during infection. A Cochrane review of 29 trials involving over 11,000 participants found that regular supplementation modestly reduces cold duration — 8% in adults and 14% in children — and severity, though it does not prevent colds in the general population. Benefits appear more pronounced in people under severe physical stress. Studies also suggest Vitamin C supports bronchial health, with supplementation at ≥400 mg/day improving FEV1% in patients with chronic obstructive pulmonary disease, though evidence in exercise-induced bronchoconstriction remains limited. Additionally, Vitamin C has been associated with maintaining thymus size and increasing T-cell numbers in animal studies, while research links it to antiviral immune responses including natural killer cell activity and lymphocyte proliferation. Without adequate Vitamin C, prolyl and lysyl hydroxylase enzymes cannot properly hydroxylate collagen precursors, which is the biochemical basis for the importance of this nutrient in tissue integrity and wound healing.

Rose hips — 25 mg

Rose hips, the pseudo fruits of Rosa canina L., have been used as herbal medicine for more than 2,000 years. They are one of the richest natural sources of Vitamin C, with content ranging from 40 mg to as high as 1,300 mg per 100 g depending on species and processing. Beyond Vitamin C, Rose hips contain polyphenols, carotenoids (including lycopene and beta-carotene), tocopherols, flavonoids, and galactolipids. Rose hip extract ranks among the highest measured antioxidant activities of tested fruits by ORAC, TRAP, and HORAC assays, and clinical studies suggest increased antioxidant status in healthy adults following supplementation. Meta-analyses of Vitamin C supplementation show an 8–14% reduction in cold duration, directly applicable to rose hip's principal bioactive compound. Rose hips also support the immune system through polyphenol- and carotenoid-mediated immunomodulatory effects. Historically, rose hip tea has been used for cold-season immune support across European and Scandinavian folk traditions, and during World War II, rose hip syrup was distributed in the UK to boost the population's Vitamin C intake when citrus fruits were scarce.

acerola fruit extract — 25 mg

Acerola (listed here as acerola fruit extract) is a concentrated source of anthocyanins, flavonoids, and phenolic acids with documented antioxidant capacity. Tart Cherry anthocyanins upregulate endogenous antioxidant pathways, including the Nrf2/ARE pathway, and human randomized controlled trials show increased DNA repair enzyme (OGG1) activity and reduced oxidative stress markers such as MDA and oxidized LDL following supplementation. Research also suggests that the anthocyanins modulate immune-inflammatory signaling by inhibiting COX-1/2 and NF-κB, reducing TNF-α, IL-1β, and IL-6 in human studies, and lowering CRP after exercise and at rest in older adults. These effects reflect immune system modulation relevant to overall antioxidant defense.

Rutin — 25 mg

Rutin (quercetin-3-O-rutinoside) is a flavonoid glycoside found in buckwheat, citrus fruits, and many other plants. Its biological activities are attributed to the presence of four hydroxyl groups and a rutinose molecule in its structure. Rutin is well-documented as an antioxidant through multiple mechanisms: direct free-radical scavenging, upregulation of endogenous antioxidant enzymes (SOD, CAT, GPx), and activation of the Nrf2/ARE pathway. Preclinical evidence — in vitro and animal models — is substantial, consistently showing reductions in oxidative stress biomarkers. Rutin modulates multiple arms of immunity: it suppresses pro-inflammatory cytokine production from human macrophages, inhibits mast cell activation relevant to allergic immunity, modulates Th1/Th2 balance, and exerts NF-κB-dependent immunomodulatory effects documented in human and animal studies. It has also been studied for mast cell stabilization and histamine-suppressing mechanisms, with research suggesting it inhibited IgE-mediated histamine release and intracellular Calcium elevation in mast cells while suppressing TNF-α, IL-1β, IL-6, and IL-8 production.

Hesperidin bioflavonoid extract — 25 mg

Hesperidin (hesperetin-7-O-rutinoside) is a flavanone glycoside predominantly found in citrus fruits such as oranges, lemons, and grapefruits. It is recognized as a potent natural antioxidant that scavenges reactive oxygen species (ROS), enhances endogenous antioxidant enzyme activity (SOD, CAT, GSH), and activates the ERK/Nrf2 signaling pathway — effects demonstrated in vitro, in animal studies, and in human randomized controlled trials measuring oxidative stress biomarkers. Research suggests Hesperidin modulates the immune system by downregulating pro-inflammatory cytokines (TNF-α, IL-1β, IL-4, IL-6, IL-8, IL-12) and upregulating anti-inflammatory IL-10, while inhibiting NF-κB and modulating leukocyte function. A human RCT showed a Hesperidin-containing supplement improved immune function in adults and enhanced the oxidative-inflammatory state. Hesperidin also exhibits anti-allergic properties by inhibiting mast cell degranulation and reducing histamine release, mechanisms directly relevant to seasonal allergic reactions, though human clinical trial data for allergies specifically remain limited.

Lemon bioflavonoid extract — 25 mg

Lemon (Citrus × limon) bioflavonoid extract provides a range of flavonoids including Hesperidin and eriocitrin — with eriocitrin found at the highest concentration in Lemon compared to other citrus species. Research suggests these bioflavonoids have documented antioxidant capacity in human studies: a citrus extract combined with Vitamin C significantly increased lipoprotein oxidation lag time in a double-blind randomized controlled trial, outperforming vitamin E as an antioxidant. Lemon's Vitamin C content also supports immune defense: a clinical review found Vitamin C intake improved symptoms and shortened duration of respiratory tract infections including the common cold. Additionally, Vitamin C from Lemon supports natural killer cell activity, lymphocyte proliferation, neutrophil function, and interferon production — all key components of the body's viral immune response.

dicalcium phosphate

Dicalcium phosphate is a Calcium salt used as a tableting agent and a source of Calcium and phosphorus. Calcium is the most abundant mineral in the human body, with more than 99% stored in bones as hydroxyapatite, where it provides skeletal strength. Beyond structural support, Calcium is widely involved in cell signaling, muscle contraction, neuronal transmission, and hormone secretion. Humans absorb about 30% of the Calcium present in foods and supplements, with absorption aided by vitamin D.

Vitamin C (1000 mg, Time Release)

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Vitamin C (1000 mg, Time Release)

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Who Benefits

Who Is This Vitamin C Formula For?

While the name of this guide is Vitamin C for kids, this particular Nature's Sunshine formula is designed for daily immune and antioxidant support in a time-release tablet format. Families looking to support their children's immune health should note that the RDA for Vitamin C ranges from 15 to 115 mg for infants and children depending on age, and 75 to 120 mg for nonsmoking adults including pregnant or lactating women.

This formula may be especially relevant for anyone looking to support immune function during seasonal challenges, promote healthy collagen production, fight free radicals, and nourish tissues. Research suggests Vitamin C's benefits are particularly notable for people exposed to brief periods of severe physical exercise or high physical stress, where evidence is stronger for a reduction in cold incidence.

If you have questions about whether this product is appropriate for your child's specific needs, our naturopath is available for a free consultation to help guide your family's supplement choices.

Usage

How to Take This Formula

Take one tablet daily with a meal. The time-release coating is engineered to slow absorption until the nutrients reach the intestines, helping deliver Vitamin C steadily throughout the day rather than all at once.

Because Vitamin C is water soluble, the body does not store it long-term, making consistent daily intake important. At low gastrointestinal concentrations, active transport predominates, while simple diffusion occurs at higher concentrations — and absorption falls to approximately 50% or less with increasing doses above 1 g/day. The time-release design of this formula addresses that absorption dynamic.

Each bottle contains 120 tablets — a four-month supply at the suggested serving of one tablet per day.

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 Vitamin C support kids' immune systems specifically?

Vitamin C is essential for immune cell function and represents one of the most established nutritional supports for immune health in children. It helps maintain epithelial barriers, enhances the differentiation and proliferation of B cells and T cells, enhances phagocytosis, normalizes cytokine production, and decreases histamine levels. A large review of 82 studies found that regular Vitamin C supplementation reduces common cold duration by 14% in children, compared to 8% in adults — suggesting children may experience a more pronounced benefit from consistent intake.

What is the recommended daily allowance of Vitamin C for children?

According to established dietary guidelines, the RDA for Vitamin C ranges from 15 to 115 mg for infants and children, depending on age. The Tolerable Upper Intake Level — above which the risk for adverse effects begins to increase — varies by age group. For adults, the UL is set at 2,000 mg per day to prevent gastrointestinal discomfort. Parents should consult a healthcare provider or our naturopath to determine the right intake for their child.

What makes the time-release design different from regular Vitamin C?

Each Vitamin C Time Release tablet includes a special coating that slows the absorption of nutrients until they reach the intestines. Because 70 to 90 percent of usual dietary Vitamin C intake (30 to 180 mg/day) is absorbed but absorption falls to about 50% or less with increasing doses above 1 g/day, the time-release design helps optimize how the body uses the Vitamin C throughout the day rather than delivering it all at once.

Why are bioflavonoids included in this Vitamin C formula?

The Vitamin C in this formula is blended with a base of Rose hips extract, acerola extract, Rutin, Lemon bioflavonoids, and Hesperidin complex. These plant-derived bioflavonoids provide their own antioxidant and immune-supportive properties. For example, research suggests Rutin modulates pro-inflammatory cytokine production and supports mast cell stability, while Hesperidin has been shown in human studies to downregulate pro-inflammatory markers and enhance antioxidant enzyme activity. Together, they complement Vitamin C's role in the body.

Can Vitamin C help shorten a cold once symptoms start?

A 2013 Cochrane review of 29 trials involving over 11,000 participants found that taking a Vitamin C supplement after a cold starts does not appear to be helpful. However, regular supplementation taken before the onset of symptoms modestly reduces cold duration — by 8% in adults and 14% in children — and may reduce severity. The benefit is most pronounced in populations under heavy physical or cold stress.

Is this product vegan and free of artificial ingredients?

Yes. Nature's Sunshine Vitamin C Time Release is a completely natural product with no sugar, starch, artificial colorings, or flavorings. It is both vegan and non-GMO, making it a clean-label option for families who want a straightforward Vitamin C supplement.

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