Zinc is an essential nutrient found throughout the body, playing a key role in supporting the immune system and metabolism. It is also important for wound healing and maintaining your sense of taste and smell.
For most people, a varied diet provides enough zinc. Good food sources include chicken, red meat, and fortified breakfast cereals.
Although zinc is commonly used to help treat colds, it can interact with certain medications and may cause side effects.
The recommended daily intake of zinc is 8 milligrams (mg) for women and 11 mg for adult men.
Research on Zinc for Specific Conditions
- Zinc deficiency: People with low zinc levels are likely to benefit the most from supplements. Zinc deficiency is uncommon in the U.S.
- Colds: Some evidence suggests that zinc lozenges or syrup taken within 24 hours of the onset of cold symptoms may reduce the duration of a cold. However, intranasal zinc has been linked to a loss of smell in some cases, which can be long-term or permanent.
- Wound healing: Individuals with skin ulcers and low zinc levels may benefit from zinc supplements to aid in healing.
- Diarrhea: Zinc supplements can help reduce diarrhea symptoms in children with zinc deficiency, particularly those suffering from malnutrition. However, there isn’t enough evidence to support using zinc supplements for children with diarrhea who have a healthy diet.
- Age-related macular degeneration: Research suggests oral zinc may help slow the progression of this eye condition.
Topical Zinc
Topical zinc, usually in the form of zinc oxide, is applied to the skin to treat conditions like diaper rash and sunburn. Zinc oxide cream, ointment, or paste can be effective in protecting and soothing the skin.

