Once hair leaves your head, it is dead, and cutting it will not make it grow any faster. Hair normally grows at the rate of about 1/2 inch per month (6 inches per year). With age, that growth can slow to 1/10th of an inch per month. You can maximize your hair’s genetic growth cycle by including amino acids and B-vitamins in your diet, including B-6, biotin, Inositol and folic acid. Minerals such as sulfur, silica and zinc, beta-carotene and protein (since hair is a protein) are also important for hair growth.