Zinc is an essential trace mineral involved in hundreds of critical biochemical processes in the body. It plays a central role in immune function, wound healing, DNA synthesis, cell growth and repair, and the maintenance of healthy skin and mucous membranes. Zinc also supports a healthy reproductive system, especially in men, and is vital for maintaining the senses of taste and smell. Because the body cannot store zinc, a consistent dietary supply is essential. Supplementation may be especially beneficial during times of stress, illness, or when dietary intake is inadequate.