Hair are appendages of the skin and cover almost the entire surface of the human body. There are only two sites where they do not grow – these are the palms of the hands and the soles of the feet.
The growth of hair in an adult is regulated by the work of the sex glands. Male sex hormones cause hair growth on the face and body, but at the same time slow their growth on the head. Female hormones act the opposite way, speeding up the growth of hair on the head and slowing down on the body. Every hair on the body grows from the follicle (hair follicle). Each person's value is laid down genetically. Follicles are organs in which various chemical processes occur that cause hair growth. Such bulbs on the human body are about a million, but the body uses only 100-150 thousand. The speed of hair growth depends on the chemical processes occurring in the follicles. The more potassium, calcium, silicon, iodine, chromium, manganese, beta-carotene, biotin in the body, the more chemical processes occur and the faster the growth hair, при этом они будут сильными и здоровыми. Недостаток в организме витаминов и минералов замедляет рост волос, они становятся тусклыми и ломкими.Скорость роста волос зависит и от возраста человека. У children волосы вырастают на 13 мм в месяц, у adults people – at 15 mm, in the elderly – at 11 mm. With the right selection of care products, hair can grow to 2 centimeter per month. Scientists found that in the morning, hair grow faster, and at night they slow down the growth or do not grow In general, the quantity and growth of hair also depends on their color. A reliable fact is that in blondes hair is less than in other people, and Red hair the thickest. Therefore, proper care, appropriate to the type of hair, is the key to their beauty, health and rapid growth. In some Women hair on the body grows according to the male type. Similar situations are observed in the fair sex, having a high level male sex hormones or taking hormonal drugs. But sometimes such phenomena can be inherited or be the result of excessive work of some enzymes of the hair follicle.