Hair growth is a complex biological process that occurs in cycles. The hair growth cycle consists of three main phases:

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>Anagen (Growth Phase): This is the active phase where hair follicles produce new hair. It can last anywhere from 2 to 7 years, depending on genetics and other factors. During this phase, the hair is actively growing.

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>Catagen (Transitional Phase): This phase lasts a few weeks. The hair stops growing, and the follicle begins to shrink. Blood supply to the follicle reduces, and the hair becomes detached from the follicle.

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>Telogen (Resting Phase): This phase lasts several months. The hair is no longer growing, but it is still in the follicle. Eventually, the hair will shed, and a new hair will begin to grow in its place.

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Hair growth is influenced by various factors, including genetics, hormones, diet, and lifestyle. Nutrients like vitamins (especially biotin, vitamin D, and iron) can play a role in supporting healthy hair. Additionally, stress and certain medical conditions can disrupt hair growth and cause thinning or hair loss.