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.

How does the duration of the anagen phase differ among various hair types?

What role do genetics play in hair growth cycles?