Minerals

Zinc

The immune mineral that declines with age.

~12% of the US population is at risk of zinc deficiency; rates are higher in older adults

Why it matters for longevity

Zinc is required for over 300 enzymes and is central to immune function, wound healing, and DNA synthesis. Zinc deficiency accelerates immune aging (immunosenescence) and increases susceptibility to infections. The Zn-Age study showed that zinc supplementation in elderly adults reduced infection rates by over 66% compared to placebo.

How much you need

RDA

11mg for men, 8mg for women

Optimal

Researchers recommend 15-30mg daily for older adults, balanced with copper to avoid depletion.

Signs you might be low

  • Frequent colds and infections
  • Slow wound healing
  • Loss of taste or smell
  • Hair loss
  • Poor appetite

Best food sources

FoodPer serving
Oysters (3 oz)74mg
Beef chuck roast (3 oz)7mg
Pumpkin seeds (1 oz)2.2mg
Lentils, cooked (1 cup)2.5mg
Cashews (1 oz)1.6mg

Key research

Prasad AS et al. (2007). Zinc supplementation decreases incidence of infections in the elderly. American Journal of Clinical Nutrition, 85(3), 837-844.

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