Chemical element symbol: Zn

RDA(=recommended daily allowance): 15 mg.

Function: An antioxidant that is required for wound healing, it improves growth, resistance and the condition of the prostate and the liver (counteracts the effects of alcohol), and it promotes a healthy skin; involved in smell and taste.

Symptoms of shortage: Loss of appetite or hair, poor resistance and white spots in fingernails.

Possible causes of shortage: Unbalanced nutrition.