In what phase does hair grow in?

Hair grows predominantly during the anagen phase. This is the active growth stage of the hair cycle, where hair follicles are generating new hair cells. During this phase, which can last for several years, a significant amount of hair growth occurs as the cells in the hair bulb multiply and push older cells upward through the follicle, ultimately forming the hair strand.

The duration of the anagen phase varies among individuals and can be influenced by factors such as genetics, health, and even age. Understanding the anagen phase is crucial for those in the cosmetology field, as it has implications for hair treatments, growth patterns, and overall hair health.

In contrast, the catagen phase represents a transitional phase where growth slows and the hair follicle begins to shrink, while the telogen phase is the resting stage before hair falls out. The exogen phase refers to the process of shedding hair. Therefore, the anagen phase is the key focus for hair growth, emphasizing its importance in the hair growth cycle.