Hair has two separate parts: the follicle and the hair shaft. The follicle lies below the scalp and produces the hair shaft (strand) that you see growing out of your skin’s epidermis layer. The follicle is alive. The hair shaft is not – it’s made of fragile, dead cells that have no regenerative properties.
The follicle is a sac of skin tissue buried deep in the scalp. It has a bulb at the bottom. The sebaceous gland is attached to the follicle. It gives hair its shine by producing a natural lubricant called sebum. The follicle is where the personal characteristics of hair are decided: curly or straight, dry or oily, and thickness.
Hair has three basic layers: the medulla, the cortex, and the cuticle. The medulla is the innermost core of the hair where the body and strength is determined. The cortex is the middle (and largest) layer. It provides strength to the hair shaft, and determines the color, texture and elasticity. The cuticle protects hair from the environment by forming a tightly packed layer of protective scales that overlap.
Hair grows from the hair follicle at an average rate of one-half inch per month. Each hair grows for four to seven years, after which it enters a “resting phase,” and then falls out. A new hair begins growing in its place between three weeks and three months later. At any one time, 85 percent of hair is growing and 15 percent is resting. The life of a hair consists of three phases:
Male-pattern baldness (also known as Androgenetic Alopecia) is the most common form of hair loss for men, representing up to 90% of all male cases. There are some 40 million male adults in North America today experiencing hair loss. Mild to moderate hair loss affects about 50% of all men by the time they are 50. Male pattern hair loss results in either a receding hair line or thinning at the crown of the head. It occurs due to a chemical known as dihydrotestosterone (or “DHT”) which builds up around the follicle and eventually kills the follicle and the hair.
A follicle’s resistance to DHT is genetic – which is why some people go bald and others do not. If you have relatives with thin hair or who are bald, you may well develop the same problem, although the gene can also skip generations and can be inherited from either the mother’s or the father’s side of the family.
Aging makes baldness more likely. Sixty five% of men have noticeable hair loss by age 60. Most elderly people have thin, fine hair even if they are not noticeably bald. Other factors and conditions that cause hair loss, include braiding (currently popular with African American men) and Alopecia Areata (spotty hair loss).
Brushing the hair 100 times a day will stimulate the circulation and prevent hair loss
» False
Vigorous brushing is more likely to injure the hairs and make the problem worse.Some hairstyles, like braiding can cause hair loss
» True
Styles that pull or put tension on the hairs - such as tight ponytails or corn-rows - can cause hair loss.Hats encourage hair loss because the hair can't breathe
» False
Hair does not need to breathe. Only the root of the hair is alive, and this gets its oxygen from the blood in the scalp.Frequent shampooing makes hair fall out
» False
The 50-100 hairs we lose each day often become tangled with the rest of the hair but are washed out when we shampoo. So we see what seems like a lot of hair in the shower after shampooing, but in reality these hairs have been shed earlier.Blow-drying can worsen hair loss
» True
The reason is that extreme heat damages the proteins in the hairs making them fragile and liable to break off. Brushing the hair during blow-drying causes more damage. If you use a hair dryer, it should be set on the coolest setting.Hair coloring, perm solutions and hairsprays worsen hair loss
» False
Hair dyes, perms and hairsprays do not affect thinning hair. Perms and hairsprays can help to disguise the problem. Remember, it is the follicle, which is located beneath the skin, that produces the hair. Chemical treatments can damage the hair strands but can't affect the follicle.Baldness can be linked to heart attacks
» Inconclusive
In 1999, doctors at Harvard Medical School found that men who had lost hair at the crown of the head had a 32% increased chance of coronary heart disease. Hair loss at the front of the head hardly increased the risk at all. Regardless of how accurate this study could be, to promote a healthy lifestyle, you should stop smoking, eat healthy, have your blood pressure checked and do some exercise.