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Zinc Bisglycinate

Research Reliability -

A highly bioavailable chelated zinc that supports immune defense, hormonal balance, skin health, and wound healing.

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Zinc Bisglycinate

Description

Zinc bisglycinate delivers zinc in a chelated form bonded to glycine, offering superior absorption and tolerability compared to zinc sulfate or oxide. Zinc is an essential trace mineral involved in over 300 enzymatic functions, including immune cell activity, testosterone production, protein synthesis, and DNA repair. It plays a key role in wound healing, skin integrity, taste and smell perception, and antioxidant defense. Suboptimal zinc levels are common and can affect immunity, fertility, and cognitive performance.

Effects

First 1–2 weeks

supports immune response, especially early in a cold

Weeks 4–8

skin, hormones and taste sensitivity may improve if you were low

Ongoing

immune and hormonal maintenance

How It Feels

On an empty stomach zinc can cause nausea within 30 minutes, so take it with food. Beyond that it is mostly a quiet immune and skin supporter. If you were deficient, clearer skin and sharper taste can show up over a few weeks.

Evidence

Evidence Strength

Moderate (some human RCTs)

Caveats

Cold-duration benefit is real but modest; strongest evidence overall is for correcting frank zinc deficiency.

Usage

Commonly Referenced Starting Amount

8–15 mg elemental zinc/day

Commonly Referenced Amount

15–40 mg elemental zinc/day is the range used in most immune and hormonal trials

Referenced Upper Limit

40 mg/day is the IOM upper limit, set by copper deficiency from displacement — pair sustained higher doses with a small amount of copper

Onset

4–8 weeks

Biomarkers to Track

Subjective

(Daily)

Frequency of colds or infections
Skin clarity and wound healing
Taste and smell acuity

Objective

(Quarterly)

Serum zinc level
Serum copper (zinc depletes copper)
Testosterone (males, quarterly)

Risks

Safe short-term. Long-term high doses deplete copper and weaken immunity, the opposite of the goal.

Who Should Skip

Anyone taking zinc daily for months without balancing copper.

Common Mistakes

Taking it on an empty stomach (nausea) and using high doses indefinitely instead of in short courses.

Disclaimer

This information is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare provider before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.