Posted in Beauty & Style

Science of Hair Growth

Hair grows from the follicle, or root, underneath the skin. The hair is ‘fed’ by blood vessels at the base of the follicle, which gives it the nourishment it needs to grow. Between starting to grow and falling out years later, each hair passes through four stages: anagen, catagen, telogen and exogen. Every hair is at a different stage of the growth cycle.

Anagen (Growing Phase)
Anagen lasts about two to seven years and determines the length of our hair.
During this phase the hair grows about half an inch per month, making it 6 inches per year.
Some people have difficulty growing their hair beyond a certain length because they have a short active phase of growth while people with very long hair have a long active phase of growth.


Catagen (Transition Phase)

After anagen comes this transitional stage. This phase lasts for about two weeks. Growth stops and the outer root sheath shrinks and attaches to the root of the hair.


Telogen (Resting Phase)

This is the resting phase which lasts around three months. Around 10-15 per cent of hairs are in this phase. While the old hair is resting, a new hair begins the growth phase.


Exogen (New Hair Phase)
This is part of the resting phase where the old hair sheds and a new hair continues to grow.
Approximately 50 to 150 hairs can fall out daily, this is considered to be normal hair shedding.


If hairs enter the resting phase too early, excess shedding and noticeable thinning can occur. That is why nutrition, avoiding stress, harsh conditions and good care are important for healthy and long hair. Which will be discussed.

Different views of my hair


I'm OnyinyeOlufunmi, a visual artist, writer and psychologist from Lagos, Nigeria.

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