Zinc

Zinc is a mineral that is concentrated in the skin, hair, nails, and eyes. Its is necessary for cell multiplication, growth,, insulin metabolism, taste, vision, and brain development.
Children are at high risk for zinc deficiency. Symptoms include poor appetite, less than average growth, and loss of taste and smell.
Peanuts are rich in zinc. Other good sources are whole grain cereals, the dark meat of turkey, port, cheese, dry beans, and lentils.