It has been asserted that zinc is the best substance available for skin care. Zinc can stimulate and promote the growth of muscle, which is better than any other inorganic substance. In the United States, liquid zinc is generally used in hospitals as a local liniment for severely burned patients. Its purpose is to regenerate the burned skin tissue and repair it faster. There is also evidence that for some children who develop slowly, if they are given 50 mg zinc sulfate every day, it can promote their normal development.