Hair grows from hair follicles. One hair follicle grows one hair, and one pore grows 2-5 hairs. A normal person has about 5 million hair follicles all over his body and about 1 million on his head. , there are about 100,000 scalps.

The three stages of hair growth:

The growth phase (2-7 years) accounts for about 85﹪-90% of the entire hair

The resting phase (3 years) -4 weeks) accounting for about 1% of the entire hair

The shedding period (3-4 months) accounts for about 9%-14% of the entire hair

Normal people lose hair from the root every day 50-100 roots

How to calculate hair loss per day: 100000*9﹪=9000 (roots) 9000/3 months 90 days=100 roots

Hair growth rate

1 day: 0.27mm-0.4mm

1 month: 1cm-1.2cm

1 year: 12cm-14cm