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  • Natural Stacks Vitamin C with Zinc
  • Natural Stacks Vitamin C with Zinc
  • Natural Stacks Vitamin C with Zinc
  • Natural Stacks Vitamin C with Zinc
Vitamin C and Zinc are potent antioxidants that can support many areas of health, including the immune system.


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Marke: Natural Stacks

Vitamin C
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.

Zinc Glycinate
As many as 2 billion people worldwide are deficient in zinc, as there are only a few foods that are good sources of zinc (like 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.

How it works

Vitamin C is a highly effective nutrient that plays a critical role in a multitude of processes in the body. It’s an essential vitamin - unlike most mammals and other animals, humans do not have the ability to generate vitamin C on their own. It must be obtained from the diet, however it can be difficult to get enough vitamin C. Some fruits and vegetable are good sources of Vitamin C but farming, storage, and cooking methods can seriously deplete the Vitamin C content.

Amazing Vitamin C

Vitamin C is a powerful antioxidant. It scavenges free radicals in the body, removing these unstable molecules as a protective mechanism (an accumulation of free radicals is thought to be most responsible for the aging process, as well as contributing to the development of inflammatory diseases and cancers). 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.

Vitamin C is critically involved in forming the proteins that your skin, connective tissue and blood vessels are made with, healing internal and external injuries, and developing scar tissue around a wounded area.  Additionally, Vitamin C helps maintain the health and function of your cartilage, bones and teeth and fortify your immune system, cellular protection, repair and regeneration.

Collagen production slows as we age, which contributes to wrinkled and slack skin, aching joints, slow recovery from exercise and injury, and reduced organ function. Studies have found that Vitamin C supplementation can override the natural reduction in collagen, keeping you feeling (and looking) younger and healthier for longer.

A Vitamin C deficiency will show up with symptoms that include fatigue, muscle weakness, and joint aches. It’s common for people to feel like they just can’t get out of bed, can’t exercise as hard as they should be able to, and to have intense aching and stiffness in their muscles and joints after exertion.

Optimal Immunity Support

Vitamin C is associated with significant increases in blood concentration of glutathione. [source] Glutathione is the body’s major internally produced (endogenous) antioxidant and is critical for the regulation of free radicals and reactive oxygen compounds in the blood stream.

It is also vital to proper metabolic function (including DNA and protein synthesis, amino acid transport, and correct enzyme expression). For this reason, the health of your glutathione system has direct implications for your immunity, nervous system, gastrointestinal system, and lung health.

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. Even mild levels of zinc deficiency can lead to reduced killer cell and macrophage activity, and is associated with increased levels of infections and disease.

Together these synergistic antioxidants provide your body with a high level of protection against the stresses of modern life. They ensure that your cells are able to fight off aggressive free radicals, that injuries large and small heal quickly, and that you don’t pick up every cold bug that goes around. Feel your best, every day.

Ingredients & use 

Immunity Support

Suggested Use: Take a serving of 1-2 servings 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 insulin sensitivity gained after exercise.

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

Vitamin C (Quali®-C ascorbic acid)

A familiar essential vitamin and antioxidant found in high amounts in fruits. Vitamin C supports numerous metabolic enzymes and is critical for cell protection.  Featuring non-GMO Vitamin C derived from corn grown in the green hills of Scotland.  

Zinc (zinc glycinate chelate)

Zinc is a mineral co-factor in more than 300 enzyme reactions related to protein and carbohydrate metabolism, DNA formation, and intercellular signaling. It’s crucial for supporting a healthy immune, skeletal, and neurological function.  Zinc Glycinate is chelated to improve absorption and bioavailability.

Quali®-C is a registered trademark of DSM.


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]


  1. A combination of high-dose vitamin C plus zinc for the common cold.
  2. Marginal vitamin C status is associated with reduced fat oxidation during submaximal exercise in young adults.
  3. Zinc for the common cold.
  4. Effects of ascorbic acid on proliferation and collagen synthesis in relation to the donor age of human dermal fibroblasts.
  5. Ascorbic acid specifically increases type I and type III procollagen messenger RNA levels in human skin fibroblast.
  6. Vitamin C function and status in chronic disease.
  7. Vitamin C may alleviate exercise-induced bronchoconstriction: a meta-analysis.
  8. Age-Related Eye Disease Study Research Group. A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E, beta carotene, and zinc for age-related macular degeneration and vision loss: AREDS report no. 8.
  9. Antioxidant nutrients protect against UVB-induced oxidative damage to DNA of mouse keratinocytes in culture.
  10. L-ascorbic acid inhibits UVA-induced lipid peroxidation and secretion of IL-1alpha and IL-6 in cultured human keratinocytes in vitro.
  11. Gene expression profiling reveals new protective roles for vitamin C in human skin cells.


When should I take Vitamin C with Zinc?
Most people prefer to take protective supplements like this in the morning. However, you can take it any time of day, though we recommend not taking it directly after a workout, as it can interfere with the exercise-induced insulin sensitivity.

How do I take it?
Take 2 capsules per day with water.

Should I take it every day?
Vitamin C with Zinc is best taken every day to keep your immunity and cellular function operating at the highest levels possible.

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