Hair loss basics

October 17, 2017 No Comments Hair Loss

The causes of hair loss in both men and women are dozens, including heredity (which is the most common cause of hair loss), some diseases (such as thyroid disease) and some medical treatments you follow. The best way to discover the cause of your  hair loss and find out if you can prevent it is to visit a Dermatologist or a specialist in Hair Transplantation.

In addition, lifestyle can be related to hair loss in men and women. Stress, exposure to chemicals or ultraviolet radiation, smoking and alcohol consumption are factors that can cause or accelerate hair loss. Also, it is important to know that certain hair styles, such as tight braids, ponytail, and hair extensions can damage hair follicles, leading to hair loss.

Hair loss most of the times is proven to be a very intense and anxious emotional experience. Regardless of the extend of your hair loss or whether you just want some information about the existing treatments and recovery, there are many effective and modern ways which you will find very helpful!

Does hair loss differ?

Although, the causes of hair loss in both sexes are dozens, that does not mean that all causes are just as common.

Hair loss and hair thinning in men are due, in the overwhelming majority of cases (> 98%), to male Androgenetic Alopecia (AGA), while in women over the 70% with corresponding Hair loss problems is due to Female Androgenetic Alopecia (FAA).

Hair follicles and the hair in numbers

  • Average number of hair on the scalp for brunette people: 110,000
  • Average number of hair on the scalp for blonde people : 140,000
  • Average number of hair on the scalp for redheads: 90,000
  • Average number of hair on the scalp for African-Americans: 60,000
  • Average number of fair per hair follicle: 2.2 (yes, each hair follicle contains lots of hairs!)
  • Diameter of normal hair: 0.06 – 0.18mm
  • Hair toughness: slightly larger than copper wire of the same diameter!
  • Hair follicle is the most energetically dynamic tissue in the human body, and hair cells are the fastest growing cells.
  • The hair itself, however, is a “dead tissue”, ie it has no metabolism. It has no vases, it has no nerves, it can not be repaired by itself, only superficial changes can be made (dying, cosmetics, etc.)

Dynamic features of hair follicles and hair

A hair does not grow forever! Hair follicle is the only organ in the human body that has the ability to grow, die and regenerate many times during the person’s life. This is called “hair follicle life cycle” and has 3 basic stages:

Anagen stage: The growth phase lasts for an average of 3 years (but may be shorter, eg 1 year, or longer, up to> 7 years). About 90% of all hair on our head every moment is in the Anagen phase of the cycle.

Catagen stage: The phase in which the hair stops growing and changes its anatomy. It lasts 2 weeks.

Telogen stage: The resting phase (which hair follicle does not produce hair) lasts for 2-3 months and involves the removal of old hair from the hair follicle. Approximately 10% of all hair on our head is in the Telogen phase of the life cycle.

After the telogen stage, the hair follicle returns to the regeneration stage, and so on. This process continues for the whole life of a man/woman!

  • Hair life expectancy: 2-7 years (although there are reports of hair> 60 years!)
  • Maximum length that a hair can reach: 70 – 90 cm (although there are reports of hair 3m!)
  • Annual hair length growth: about 12 cm, 0.3 mm / day
  • Women’s hair grows slower than men’s
  • Men’s hair are more dense than women

Hair loss quick facts

  • Daily hair fall average varies from 100-150 hair, depending on the time of year, may be fewer or more.
  • If you lose hair at this rate, you won’t have a hair loss problem because this is the normal rate that your hair grow back again on your head.
  • If the hair you lose are not replaced by the same number of new hair, then you will experience a  hair loss problem at some point.
  • The human eye can’t notice the gradual progress of hair loss. When hair loss becomes apparent, about 50% of the hair have already been lost. Therefore, you may suffer from gradual hair loss for years without noticing it.
  • Frequent or rare shampooing is not associated by any means with hair loss
  • Haircutting does not affect or “boost” hair growth.


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