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Vitamin C + Zinc Glycinate

For Antioxidant Support & Immune Function
Rated 4.9 out of 5
36 Ratings
Regular price $21.95 List price



  • For Antioxidant Support & Immune Function
  • Boost Neurological Function
  • Stacked With a Fully-Chelated Zinc Glycinate

Protect Your Body

Natural Stacks VitaminC is a highly protective antioxidant

It enables your body to create collagen for healthy skin, hair, and nails.

Vitamin C is one of the essential vitamins to support proper metabolic function.

High level of protection against stressors of modern life

It scavenges free radicals in the body, removing these unstable molecules as a protective mechanism for optimal health and wellness.

We stack our Vitamin C with a fully chelated Zinc Glycinate to boost immunity and neurological function.   

Amazing Vitamin C

Vitamin C is a powerful antioxidant. It scavenges free radicals in the body, removing these unstable molecules as a protective mechanism for optimal health and wellness. 

We stack our Vitamin C with a fully chelated Zinc Glycinate to boost immunity and neurological function. 

Not only is Vitamin C highly protective, but it enables your body to produce collagen. Collagen is essential for healthy joints, connective tissue and skin.

Optimal Immunity Support

Vitamin C is vital to proper metabolic function (including DNA and protein synthesis, amino acid transport, and correct enzyme expression).

Zinc is another critical factor in maintaining a healthy immune system. It’s involved in cell division and replication, it speeds up injury repair, and ensures proper growth patterns and sensory development. Together these synergistic antioxidants provide your body with a high level of protection against the stresses of modern life.

A 2012 meta analysis on two double-blind, randomized, placebo-controlled trials found that “Vitamin C plus Zinc was significantly more efficient than placebo at reducing rhinorrhoea (runny nose)” [1]

The Journal of Nutrition & Metabolism published an 8-week study on young adults showing that “low Vitamin C status is associated with reduced fat oxidation”. It provided proof that a Vitamin C deficiency can hinder healthy weight loss. [2]

When reviewing 15 independent studies with a total of 1,360 participants, researchers found that “zinc administered within 24 hours of onset of symptoms reduces the duration and severity of the common cold in healthy people.” and “When supplemented for at least 5 months, it reduces cold incidence”. [3]

The Journal of Investigative Dermatology found that ascorbic acid [Vitamin C] could increase the rate of collagen production in a variety of age groups, as well as being capable of “overcoming the reduced proliferative capacity of elderly dermal fibroblasts”. [4] It can also significantly increase the rate of overall collagen production, without interfering with the production of precollagen mRNAs. [5]

High dietary intake of vitamin C is associated with notably lower incidences of common chronic diseases, “including heart disease, cancer, eye diseases, and neurodegenerative conditions”, and “the evidence that ascorbic acid acts as an important antioxidant in many body tissues is convincing”. [6]

In a meta-analysis of five controlled trials, Vitamin C administered prior to exercise led to a 48% reduction in symptoms of exercise-induced bronchoconstriction (tightness in the chest and difficulty breathing). [7]

A study of 3640 older adults with age-related macular degeneration found a “statistically significant odds reduction for the development of advanced AMD with antioxidants [Vitamin C & Vitamin E] plus zinc”. [8]

Vitamin C is potentially protective against UVB sun damage to skin cells [9], and is involved in the reduction of inflammatory cytokines in UVA damaged keratinocytes (outer skin cells) [10].

Vitamin C is also positively correlated with faster cell repair in skin lesions. “Cells exposed to AA2P (ascorbic acid) increased the expression of genes associated with DNA replication and repair… vitamin C may protect the skin by promoting fibroblast proliferation, migration, and replication-associated base excision repair of potentially mutagenic DNA lesions.” [11]



Most Vitamin C supplements today are chemically synthesized and sourced from genetically modified corn, potentially hindering the benefits of this essential nutrient. Natural Stacks Vitamin C with Zinc Glycinate features Quali-C® derived from non-GMO corn grown in the green hills of Scotland.


As many as 2 billion people worldwide are deficient in zinc, as there are only a few foods that are good sources (such as oysters, salmon, cheese, and certain nuts). It’s crucial for supporting your body’s immune system and neurological function. Zinc Glycinate is chelated to improve absorption and bioavailability.

Suggested Use

Take a serving of 1-2 capsules per day, or as directed by a healthcare practitioner.

Vitamin C can be taken anytime throughout the day, however we suggest not taking it immediately after working out as antioxidants can nullify the recovery effects.

U.S.A. manufactured in a cGMP facility. Natural Stacks proudly uses only the highest quality ingredients.

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Open Source

Most companies use "proprietary blends" so they don't have to tell you the amount of each ingredient in their formulas. At Natural Stacks we believe it's your right to know exactly what you're putting into your body. We proudly publish our innovative formulas and ingredient suppliers in an open source format.

Learn About Our Commitment To Transparency

100% Happiness Guarantee

If for whatever reason you're unsatisfied with your Natural Stacks supplements, you can keep the full bottle on us and we'll refund your money. Anything after the first bottle, we'll ask that you return for a refund.

User Reviews

average rating 4.9 out of 5
Based on 36 ratings
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100% of reviewers would recommend this product to a friend
26 Reviews
Rated 5 out of 5
Review posted

Awesome Immunity

This combo works superbly esp when I’m traveling because I tend to catch cold and flu due to lowered immunity. But by having Vit C + Zinc combo I’ve been fine over my last 5-6 trips.

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Rated 5 out of 5
Review posted

Perfect combo

Vitamin C and Zinc are powerful together for combatting cellular stress. Ever notice how some people age faster? It’s directly connected to a blip in natural antioxidant activity at the cellular level. Help a cell out with exogenous Vitamin C and Zinc.

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Rated 5 out of 5
Review posted

No Worries!

What is most important to me about the Natural Stacks Vitamin C is that it uses food based ingredients. Most other Vitamin C products are made from synthetic thanks! I trust Natural Stacks and really appreciate not having to worry about quality. And a bonus is that their customer support rocks!

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Rated 5 out of 5
Review posted

Good stuff

Very high quality bio available vitamin c

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Rated 5 out of 5
Review posted


I don't feel any different, but I know I needed the Vitamin C. It probably will take a couple of weeks before I see or feel any different.

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Citations & References

1. Maggini, S., Beveridge, S., & Suter, M. (2012). A combination of high-dose vitamin C plus zinc for the common cold. Journal of International Medical Research, 40(1), 28-42.

2. Johnston, C. S., Corte, C., & Swan, P. D. (2006). Marginal vitamin C status is associated with reduced fat oxidation during submaximal exercise in young adults. Nutrition & Metabolism, 3(1), 35.

3. Singh, M., & Das, R. R. (2011). Zinc for the common cold. The Cochrane Library.

4. Phillips, C. L., Combs, S. B., & Pinnell, S. R. (1994). Effects of ascorbic acid on proliferation and collagen synthesis in relation to the donor age of human dermal fibroblasts. Journal of Investigative Dermatology, 103(2), 228-232.

5. Geesin, J. C., Darr, D., Kaufman, R., Murad, S., & Pinnell, S. R. (1988). Ascorbic acid specifically increases type I and type III procollagen messenger RNA levels in human skin fibroblasts. Journal of Investigative Dermatology, 90(4), 420-424.

6. Jacob, R. A., & Sotoudeh, G. (2002). Vitamin C function and status in chronic disease. Nutrition in clinical care, 5(2), 66-74.

7. Hemilä, H. (2013). Vitamin C may alleviate exercise-induced bronchoconstriction: a meta-analysis. BMJ open, 3(6), e002416.

8. Age-Related Eye Disease Study Research Group. (2001). A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E and beta carotene for age-related cataract and vision loss: AREDS report no. 9. Archives of Ophthalmology, 119(10), 1439.

9. Stewart, M. S., Cameron, G. S., & Pence, B. C. (1996). Antioxidant nutrients protect against UVB-induced oxidative damage to DNA of mouse keratinocytes in culture. Journal of Investigative Dermatology, 106(5), 1086-1089.

10. Tebbe, B., Wu, S., Geilen, C. C., Eberle, J., Kodelja, V., & Orfanos, C. E. (1997). L-ascorbic acid inhibits UVA-induced lipid peroxidation and secretion of IL-1α and IL-6 in cultured human keratinocytes in vitro. Journal of investigative dermatology, 108(3), 302-306.

11. Duarte, T. L., Cooke, M. S., & Jones, G. D. (2009). Gene expression profiling reveals new protective roles for vitamin C in human skin cells. Free Radical Biology and Medicine, 46(1), 78-87.

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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