Hair is dead material when it leaves its root – otherwise it would hurt very much when you cut it.
A blonde head of hair has usually much more strands than red or dark hair heads.
Hair consists mainly of keratin, which is also responsible for the elasticity of fingernails.
Even on a good hair day, everyone loses at least 40 to 100 strands.
The average scalp has 100,000 strands, or just fewer than 1000 per square inch.
We are born with all our hair follicles. Some are programmed to grow pigmented hair (as on our scalp) up to 3 feet in length.
The trait for baldness can be passed down through paternal or maternal genes.
Hormone imbalance and crash dieting can trigger temporary hair loss.
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