Zinc
A trace mineral important for immune function, wound healing and hormone production.
Recommended intake
8–11mg/day for most adults.
Upper limit
40mg/day for adults without medical supervision.
Deficiency signs
- • Slow wound healing
- • Frequent infections
- • Reduced sense of taste or smell
Food sources
- • Meat
- • Shellfish
- • Legumes
- • Seeds
Evidence note
Moderate evidence for immune support and reducing cold duration when taken early in illness.