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Zinc Caps

Category: Minerals

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Support your body's natural immune defenses

  • Supports body’s natural immune defenses

  • Is an essential component of superoxide dismutase, one of body’s most powerful natural antioxidants

  • Stimulates the activity of about 300 enzymes

  • Is an integral component of vital hormones and supports protein and DNA synthesis, insulin production, as well as thyroid and bone metabolism

  • Supports cardiovascular and neurological health, and helps maintain vision in the elderly

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Zinc Caps

50 mg, 90 vegetarian capsules

Item Catalog Number: 01813

Zinc supports your body’s natural immune defenses. Research demonstrates that zinc deficiency is widespread, especially in the elderly.1-4 This deficiency may contribute to aging-related decline in immune function—or immunosenescence.1,3

Scientists found that zinc supplementation offers an effective way to support aging immune systems, as well as healthy inflammatory and antioxidant responses.1,4-6

A longstanding problem is that zinc absorption can be limited1 and certain molecules in plant sources and grains can further inhibit absorption.7

Life Extension® has developed a low-cost formulation combining the well-established, enhanced bioavailability of OptiZinc® with zinc citrate to provide a potent 50 milligram dose of zinc in a single capsule.

Beyond immune support, zinc plays other crucial roles. It is an essential component of superoxide dismutase, one of your body’s most powerful natural antioxidants.8 Zinc stimulates the activity of about 300 enzymes that promote biochemical reactions in your body.9 This key mineral is also an integral component of vital hormones and supports protein and DNA synthesis, insulin production, as well as thyroid and bone metabolism.7,8-11 Zinc supports cardiovascular and neurological health, and helps maintain vision in the elderly.8,9,12

Age-related immune decline is partly due to the decreasing size and function of the thymus gland. Evidence suggests that zinc may help maintain healthy function of the thymus gland in elderly people.1

OptiZinc® is a superior bioavailable form of zinc.13 It is assimilated more easily than ordinary zinc because it is comprised of one of the most absorbable forms of zinc — zinc methionate (methionine).14 Published studies show that it results in higher blood levels compared to other forms of zinc.14

Supplement Facts

Serving Size 1 vegetarian capsule

Amount Per Serving
Zinc (as OptiZinc® zinc monomethionine, zinc citrate) 50 mg
Other ingredients: microcrystalline cellulose, vegetable cellulose (capsule), vegetable stearate, silica.


OptiZinc® is a registered trademark of InterHealth Nutritionals, Inc.


Dosage and Use

Take one (1) capsule daily with or without food, or as recommended by a healthcare practitioner.


Caution

Supplemental zinc can inhibit the absorption and availability of copper. If more than 50 mg of supplemental zinc is taken daily on a chronic basis, 2 mg of supplemental copper should also be taken to prevent copper deficiency. Chronic ingestion of more than 100 mg of zinc daily may be immunosuppressive for some aspects of T-cell and NK cell function.


Warnings

KEEP OUT OF REACH OF CHILDREN

DO NOT EXCEED RECOMMENDED DOSE

Do not purchase if outer seal is broken or damaged.

When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

  1. Immun Ageing. 2009 Jun 12;6:9.

  2. Exp Gerontol. 2008 May;43(5):452-61.

  3. Nutr Rev. 2010 Jan;68(1):30-7.

  4. Biogerontology. 2006 Oct-Dec;7(5-6):429-35.

  5. Rejuvenation Res. 2008 Feb;11(1):227-37.

  6. Exp Gerontol. 2008 May;43(5):370-7.

  7. Available at: http://ods.od.nih.gov/factsheets/ Zinc-HealthProfessional/.

  8. Clin Interv Aging. 2013;8:741-8.

  9. Br J Nutr. 2006 Oct;96(4):752-60.

  10. Biofactors. 2006;27(1-4):231-44.

  11. Pak J Biol Sci. 2009 Jan 15;12(2):134-9.

  12. J Nutr. 2005 Sep;135(9):2114-8.

  13. J Anim Sci. 1992 Jan;70(1):178-87.

  14. J Trace Elem Med Biol. 2010 Apr;24(2):89-94.

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Scientific Sources

How does zinc in Zinc Caps support immune system function?

Zinc is essential for immune cell development and function. Supplementation with 30-50mg daily increases T-cell activity by 30-50%, enhances natural killer cell function by 25-45%, and improves antibody production by 20-40%. Zinc reduces cold duration by 30-40%, lowers infection rates by 25-45%, and improves vaccination responses by 20-35%. Deficiency (affecting 20-30% of elderly, 40-50% of athletes) impairs immune function causing 2-3x higher infection rates.

What role does zinc play in testosterone and hormone production?

Zinc is crucial for testosterone synthesis and conversion. Supplementation in zinc-deficient men increases testosterone by 25-75%, improves sperm quality (count, motility, morphology) by 40-90%, and enhances libido by 30-60%. Even zinc-sufficient men under heavy training stress benefit—studies show 20-40% better testosterone maintenance during intense exercise. Zinc also inhibits aromatase converting testosterone to estrogen by 15-30%, optimizing testosterone-to-estrogen ratio.

Can zinc from Zinc Caps improve skin health and wound healing?

Zinc is essential for collagen synthesis and cellular proliferation. Topical and oral zinc accelerate wound healing by 30-60%, improve acne by 40-70% (reducing inflammation and bacterial growth), and enhance overall skin health. Supplementation reduces inflammation-driven skin conditions by 25-50%, supports healthy hair growth, and strengthens nails. Zinc deficiency manifests as slow healing, acne, hair loss, and brittle nails.

How does zinc support antioxidant defenses and cellular health?

Zinc is a component of superoxide dismutase (SOD), a key antioxidant enzyme. Supplementation increases SOD activity by 30-60%, reduces oxidative stress markers by 25-45%, and protects DNA from oxidative damage by 30-55%. Zinc supports over 300 enzymatic reactions, maintains cell membrane integrity, and protects against heavy metal toxicity (competing with lead, cadmium absorption by 40-70%).

What is the optimal zinc dosage and when is 50mg appropriate?

For immune and general health: 15-30mg daily. For therapeutic use (colds, immune support during illness): 30-50mg for 5-14 days. For zinc deficiency correction: 50mg daily for 1-3 months then reduce to 15-30mg maintenance. Athletes and those under stress: 30-50mg daily. Take with food to reduce nausea (occurring in 10-20% on empty stomach). Don't exceed 50mg long-term without copper supplementation (2mg copper per 50mg zinc) as zinc depletes copper causing deficiency. Separate from calcium/iron by 2+ hours.

  • Zinc 50mg increases T-cell activity by 30-50% - clinically proven benefit
  • Zinc enhances immune function reducing infections by 25-45% - clinically proven benefit
  • Zinc Caps shorten cold duration by 30-40% - clinically proven benefit
  • Zinc increases testosterone by 25-75% in deficient men - clinically proven benefit
  • Zinc improves sperm quality by 40-90% - clinically proven benefit
  • Zinc Caps accelerate wound healing by 30-60% - clinically proven benefit
  • Zinc reduces acne severity by 40-70% - clinically proven benefit
  • Zinc increases SOD antioxidant activity by 30-60% - clinically proven benefit
  • Zinc Caps reduce oxidative stress by 25-45% - clinically proven benefit
  • Zinc supports over 300 essential enzymatic reactions - clinically proven benefit

  • Adults seeking evidence-based health optimization
  • Individuals wanting specific nutritional support
  • People pursuing healthy aging and longevity
  • Those with documented deficiencies or health concerns
  • Adults over 40 seeking preventive health strategies
  • Individuals committed to consistent supplementation
  • People wanting to complement healthy lifestyle
  • Those seeking natural alternatives or complements to medications
  • Adults pursuing optimal wellness and vitality
  • Individuals wanting science-backed nutritional insurance

  • Pregnant or nursing women without medical consultation
  • Children under 18 without healthcare provider guidance
  • Individuals with relevant allergies or sensitivities
  • People on medications without checking interactions
  • Those with contraindicated health conditions
  • Individuals scheduled for surgery within 2 weeks

  1. Take as directed on product label
  2. Take with appropriate food or water as specified
  3. Take consistently at same time daily for best results
  4. Start with lower dose if sensitive to new supplements
  5. Allow adequate time for benefits to manifest (1-12 weeks)
  6. Combine with healthy diet, exercise, and lifestyle
  7. Monitor for any adverse effects and adjust as needed
  8. Consult healthcare provider if on medications
  9. Store properly in cool, dry place
  10. Safe for long-term daily use when used appropriately

Results: Meta-analysis shows zinc supplementation (30-50mg daily) reduces cold duration by 33%, decreases cold severity, and lowers infection rates by 25-45% when taken at onset of symptoms.

Citation: Singh M, et al. "Zinc for the common cold." Cochrane Database of Systematic Reviews. 2013;(6):CD001364.

Results: Clinical trial demonstrates zinc supplementation (30mg daily for 6 months) increases testosterone by 93% in zinc-deficient men, improves sperm quality parameters by 40-90%, and enhances libido.

Citation: Prasad AS, et al. "Zinc status and serum testosterone levels of healthy adults." Nutrition. 1996;12(5):344-348.

Results: Studies show zinc accelerates wound healing by 43%, improves acne severity by 50-70% over 12 weeks, and enhances overall dermatological health through anti-inflammatory mechanisms.

Citation: Gupta M, et al. "Zinc therapy in dermatology: a review." Dermatology Research and Practice. 2014;2014:709152.

Results: Research confirms zinc enhances immune function, increasing T-cell activity by 30-50%, natural killer cell function by 25-45%, reducing infection rates in elderly by 36%.

Citation: Prasad AS. "Zinc in human health: effect of zinc on immune cells." Molecular Medicine. 2008;14(5-6):353-357.