What does zinc do for you? It promotes healing from wounds and injuries. For example, a zinc mouthwash can heal bleeding gums. Zinc is involved in sexual development and reproduction, it is important in prostate health, and it aids in carbohydrate digestion. Long term use of zinc can deplete copper in your body. You may want to supplement copper at the same time. Food sources are wheat bran and wheat germ, sunflower seed, sprouted seeds, green leafy vegetables as well as lean beef and eggs.