On average, graying of hair starts from the age of 35. The hair on the head turns gray faster than the hair on the beard and mustache.There is no way to prevent graying of hair in the middle of the age, but the conditions of graying of hair always depend on the experience of the age. Mechanics of cloud shedding In the lower layer of the skin and in the place of the hair follicle, there are melanocyte cells that always produce a type of compound called melanin. It turns white in the event that the number of melanin in the hair is less than its normal condition, the hair becomes gray or silver. About 10 out of 100 melanocytes lose their normal size and pigment production every 10 years Although the exact method of hair loss is not known, it has been proven that in the early stages of gray hair, melanocytes are present but inactive. It is 34 years for whites and 42 years for blacks. When a white person's hair turns white at the age of 20 and blacks at the age of 30, this condition is called premature graying. In women, it occurs at the age of 35, but nutrition and genetic issues change this age.