Zinc Zn Atomic Number: 30 Atomic Weight: 65.39 ______________________________________________________________________________ Human Physiology: - Crucial to more than 300 enzymes in the body - Muscle and bone contain 90% of the body's zinc - Prostate gland and semen - Essential to T-cells of immune system - RDA: 30mg/day Prevalence: - 23rd most abundant in the earth's crust Source: - Red meat - Poultry, fish, seafood - Whole cereals - Dairy Deficiency: - Reduced, weakened T-cells - Decreased ability to fight infection - Anorexia Excess: - G.I upset - Metallic taste - Headache - Drowsiness