Hair grows from the hair follicle in repeated cycles. Each hair has an individual, independent life cycle. This can be divided into three steps:

1. Anagen – Hair growth phase
About 85% of hair goes through a growth phase. Hereditary factors determine the duration of the individual growth phase. On average, it lasts 2-6 years. Hair grows an average of 10 cm per year.

2. Catagen – Transition phase of hair
This phase takes 1-3 weeks. The hair follicle shrinks to 1/6 of its normal length. The lower part of the hair follicle atrophies and hair growth stops.

3. Telogen – Hair resting phase
During the resting phase, which lasts 5–6 weeks, the hair does not grow, but is still attached to the hair follicle. About 10-15% of the hair is in this stage at the same time. At the end of the resting phase, the hair falls off and the growth phase, when the formation of new hair begins, starts immediately. If the old hair hasn’t fallen out yet, the growing new hair will push it out of the way.

Did you know that?
Hair grows about 1 cm per month
Each hair “lives” for about 2-6 years
When a hair falls out, new hair grows in its place
About 50-100 hairs fall out every day
The diameter of the hair is about 0.05–0.15 mm
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