Zinc is an essential trace element present in all tissues. Your body cannot store zinc but has a rapid turnover rate which is why you need to keep supplies up. What does it do? It is needed for growth and human development It is essential for a healthy immune system It helps to balance blood sugars through insulin It helps to maintain healthy liver function, digestion and proper metabolism of carbohydrates It helps to maintain a healthy nervous system It is involved in reproductive organs, prostate gland and healthy semen