Wednesday, October 21, 2009

Hair loss myths

Hair Loss is hereditary:
The majority of hair loss in both men and women are genetics - that is, hair loss is a hereditary trait and can be inherited from either the mother's or father's side.

Hats Can Cause You To Go Bald:

Unless the hat is worn so tight as to cut off circulation to the hair follicles, wearing a hat does not cause hair to fall out. Instead, hats can contribute positively by blocking the sun and preventing sunburn.
Wearing hat for too long especially in hot and humid climate, however, can contribute to the excretion and accumulation of sebum and oil on your hair. Sebum is a waxy substance that is secreted by the sebaceous glands in your skin onto hair follicles. Overtime, sebum can react with cholesterol to create a hardened sebum plug that cuts off oxygen circulation to the hair follicles and cause it to fall out. Sebum plug can also accumulate dirt and become a breeding ground for bacteria and contributing to hair loss.

Brushing or massaging the scalp can reduce hair loss:

There is no scientific proof that brushing or massaging the scalp to improve circulation will prevent or reduce hair loss.

Hair loss stops after a certain age:
Hair loss is a progressive trait that doesn't stop at any particular age. Regardless of whether a person still has a full head of hair or thinks they've lost all they can, hair loss can increase over time.

Tuesday, October 13, 2009

The causes and the specific mechanism that causes Male Pattern Baldness

Research indicates that the amount of androgen in the body has a lot to do with male pattern baldness. Androgen directly affects the lower levels of fertility and hair loss among men.
Men who display male pattern baldness typically have lower levels testosterone, but a proportionately higher level of DHT in their body.
Hormones are not only the main cause of male pattern baldness. There are certain other conditions also like metabolic syndrome, obesity, diabetes, high blood pressure, prostate cancer, and heart diseases.
Male pattern baldness is believed to be genetic in nature. If both sides of the family have histories of male pattern baldness, there is a greater chance for male members to have the condition.
Age is also a contributing factor to hair loss and male pattern baldness. As testosterone levels decrease with age, baldness continually progresses as more and more follicles become sensitized to the hormones.
In women whose ovaries are removed during surgery or destroyed by disease, thinning of scalp hair and increased growth of body hair are not uncommon.

The Specific Mechanism:-

The specific mechanism that causes male pattern baldness is initiated by an androgen called testosterone. Testosterone itself does not cause baldness, when it is acted upon by an enzyme called 5-alpha reductase, a new related hormone is formed called dihydroxytestosterone, or DHT. This causes the follicles of the hair to become sensitized and to turn off their typical renewal cycle.
When the metabolism in the hair follicles slows, the blood supply to the bald area decreases causing the epidermis of the scalp to become more and thinner. This is a result of baldness, not a cause.

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