Did you know that as hair falls out it is replaced by new hair produced from the same hair follicle, located under the skin?
Hair emerges from hair follicles, small sac-like structures located deep in the scalp and whose function is to produce hair. The follicle can go through up to 25 complete growth cycles and the number of follicles decreases with age.
The main component of hair is keratin. In addition to keratin, the presence of melanin is notable, which determines the hair colour.
Under a microscope, our hair would be seen to have three different layers: the cuticle, the cortex and the medulla.
The hair is in the growth phase. It lasts 2 to 6 years; on average: 3 years.
The hair stops growing and remains at rest for 3 weeks.
The hair is pushed out and replaced by a new hair. This process is repeated throughout the cycles. This phase lasts 3 months.
Hair grows about 1cm per month
Hair thinning becomes apparent initially between the ages of 25 and 30 #Pilexil
Blond people tend to have more hair (140,000 hairs) than brown-haired people (105,000) or red-haired people (90,000) #Pilexil
The word alopecia comes from the Greek word “alopex” (fox), because this animal sheds its fur in spring and autumn #Pilexil
A normal adult has 80,000 to 150,000 hairs on the scalp, at the rate of 250 hairs per square centimetre #Pilexil
The chance of developing early hair loss is 4 times greater in white men than in black men #Pilexil
The Japanese develop androgenetic hair loss about a decade later than white people #Pilexil
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