Process and problems with male and female hair growth - Role of DHT

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HomeBiology Of Hair Growth

Biology of Hair Growth

Humans have been passionate with their hair since time immemorial. Hair in humans serves a variety of purposes such as providing insulation, giving colour and enhancing beauty, though, in modern times it has been a discerning feature of human lifestyle. Hair is an external outgrowth on the human skin and its abundancy and distribution over the body is controlled by multiple factors like genetics, hormones, nutrition and environment.

Hair Growth Process

Hair is a filamentous outgrowth of the skin found in humans and other mammals just like nails. Growth of hair from follicular cells to elongated shafts and then falling is divided into three phases: anagen, catagen and telogen. Though male/female hair growth is controlled by hormones, proteins, vitamins and minerals, heredity remains to be the determining factor. Generally, both males and females start loosing hair while they age, owing to hereditary and/or irregular/imbalanced diet.

Hair Growth and Hair Complications
Balanced diet and healthy lifestyle reduces the hair complications. But todayís fast paced life, food habits, pollution and stress give rise to several hair growth complications like baldness, thinning, messiness, losing gloss, ill-texture and whitening. Sudden premature hair loss is the growing concern of the time. The hair growth cycle is often affected by many factors.

Reasons of Hair Loss
Common cause of hair loss/baldness in women is alopecia, a genetic disorder commonly known as female pattern baldness. Alopecia is inherited either from motherís or fatherís side of the family. It is caused by the enzymes, aromatase (predominantly in women) and 5-a reductase (both in men and women). Besides, there are many other reasons, like stress, malnutrition, liver problems, etc.

Role of DHT
Dihydrotestosterone (DHT), an androgen, is thought to be choking/blocking the hair follicles thereby inhibiting the process of adenylate cyclase. Due to this action of DHT, when it is abundant in the scalp it hinders hair growth. DHT is responsible for Androgenetic Alopecia and for stimulating the growth of body hairs.