Hair is made from nutrients in the body, and nutritional deficiencies can cause hair damage and hair loss. For example, biotin deficiencies have been linked to hair loss and skin disorders & sufficient levels of the B vitamins are necessary for hair health and growth .
More than 50% of men over the age of 50 will experienced some form of hair loss. the average number of hairs on a male human head is approximately 1lkh - 1.5lkh. Men with fair hair actually normally have more hair on the heads than men with darker hair. Hair loss can affect men of all ages, from their late teens upwards.