How Does Hair Know When to Stop Growing?

The video explains the hair growth cycle, which includes the anagen, catagen, and telogen phases. Each hair type has a different growth duration and speed, influenced by genetics and chemical signals. The anagen phase is when hair grows, catagen is a transitional phase, and telogen is the resting phase. Hair growth varies across the body, with scalp hair having a longer anagen phase than body hair. Scientists are still studying how hair knows when to grow and stop.

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