The hair bulb, a term often mentioned in the world of trichology and hair care products, represents the foundation of hair health and growth. But what exactly is it and what are its different types? In this article, we delve into this fundamental aspect of hair biology.

The hair bulb is the part of the hair follicle where hair growth occurs. It is located in the deepest part of the follicle and contains stem cells that produce new hair. Thanks to a rich supply of blood and nutrients, the bulb is capable of producing a healthy and strong hair.

There are two main types of hair bulbs: the active hair bulb and the inactive hair bulb.

The Active Hair Bulb: During the active, or anagen, phase, the bulb is full of stem cells that rapidly divide to form the hair shaft. This is the phase during which hair actively grows and can last from two to seven years. The Inactive Hair Bulb: During the resting, or telogen, phase, the hair bulb no longer produces hair. This phase lasts about three months, after which the hair is shed and a new hair begins to grow from the bulb. Understanding the structure and function of the hair bulb can help improve hair health and prevent problems such as thinning and hair loss. The use of hair care products that nourish and protect the bulb can help maintain healthy and strong hair.