|
Human
Hair – Some Quick Facts
What’s
hair all about?
How
does hair grow?
Why
do women experience hair loss?
Hair
Care Tips
Hair
Loss – True or False?
- We each have about 100,000 hairs on the scalp
- You need to lose about 50% of your hair before hair loss becomes
noticeable
- It is normal to lose 50-100 hairs from the head each day
- Scalp hair grows at a rate of about 1 cm (just under 1/2 inch) a month
- Each hair on the head grows for about 4-7 years before being shed
- Approximately 40 million men and 30 million women in North America
experience hair loss
Back
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.
Back
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:
- ANAGEN PHASE. when the hair is actually growing;
- CATAGEN PHASE. short transition stage (2-3 weeks) when
hair stops growing; and,
- TELOGEN PHASE. when the hair is resting. At the end of
the telogen stage, the hair shaft falls out and a new strand starts to
grow in its place.
Back
Hair defines many things for women – personality, attractiveness,
success, health, social status and even family tradition. Hair loss in women
has long been considered a taboo due to social stigma. It’s much more common
than most people think – roughly 30 million adult women in North America
experience thinning hair and hair loss, and some 50% of all women do by age 50
are affected. The psychological effects for women can be devastating.
The most prevalent type of hair loss among women is female pattern
thinning, known medically as Androgenetic Alopecia (genetic, diffuse hair
loss). But there are many other reasons for women’s hair loss, including
menopause-related hormonal imbalances, postpartum/ stress-related shedding,
chemotherapy, and Alopecia Areata (spotty hair loss). Some hair loss is
actually self-induced: The use of harsh chemical relaxers (Scarring Alopecia),
or tight hair braiding (Traction Alopecia) can permanently damage the hair
follicle.
Some prescription drugs also induce hair loss. In addition, between 4
million and 8 million women in America have varying degrees of
trichotillomania (chronic hair pulling), an obsessive-compulsive disorder that
can cause permanent damage to the hair follicle.
There are some forms of hair loss among women that are still not fully
understood by the medical community. Many women have expressed frustration at
what they consider to be a lack of solutions to the problem.
Back
Step 1: Shampoo your hair frequently
It is good to shampoo your hair – we recommend at least three times a week.
This helps to remove dirt and buildup on the hair that can deteriorate the
condition of your scalp. When shampooing, it is very important that you pay
attention to cleansing your hair, your scalp and your hair line. Many people
(wrongly) will drop a handful of shampoo on their head and then rinse it off.
Shampoo must be worked through all of your hair, as well as the scalp and
hairline. Did you notice that when you shampoo your hair the amount of lather
often varies? Usually, the more lather you have, the less buildup you have on
your hair. It’s also important to fully rinse out the shampoo to eliminate
any residual detergents – they can damage the hair shaft and scalp.
- Step 2: Use a conditioner and moisturize, moisturize, moisturize
Frequently shampooing can dry out your hair and, therefore, must be
followed by the use of a moisturizing conditioner. It is very important to
work the conditioner through all of your hair and leave it in for three to
five minutes. Again, many people misapply and misuse conditioner by not
working it through to the ends of the hair and not leaving it on long
enough. Correct use of conditioners containing light proteins, such as
hydrolyzed human hair keratin proteins, can help strengthen your hair. A
good conditioner with these proteins can easily penetrate the hair shaft
to replenish nutrients. These proteins can also repair split ends. Split
ends develop after the protective cuticle has been stripped away from the
end of hair fibers as a result of harsh chemicals or even vigorous
brushing.
- Step 3: Protect your hair from the elements. Use a leave-in
conditioner that contains sun block (UV protector).
Excessive exposure to the sun can damage your hair by inducing oxidation
of the sulfur molecules within the hair shaft, leaving the hair weak,
brittle, dry and faded. People who bleach or lighten their natural hair
color may also notice slight color changes in their hair when it is
exposed to sun. Blond hair may turn yellow, fade or become dull due to UV
exposure. Even natural brunette hair tends to develop reddish hues from
sun exposure due to oxidation of melanin pigments.
- Step 4: Maintain a healthy diet
Hair requires the same overall nutrition that the body does: plenty of
fresh fruits and vegetables, grains and protein including lean meat and
fish. Dietitians recommend foods high in biotin, including brown rice,
bulgar, brewer’s yeast, soybeans, green peas, lentils, oats, sunflower,
seeds and nutritious nuts. Nutritionists advise healthy hair seekers to
eat well-balanced diets that incorporate healthy proteins along with foods
high in vitamins B, C, E, A and K. Hair instantly responds to the addition
of protein-rich foods such as meats, eggs, cheese, seeds and nuts. Fish
packs a double punch of protein combined with healthbuilding essential
fatty acids and natural oils. We recommend you discuss your diet with a
medical professional.
Back
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.
Back
|