Which phase of the hair growth cycle is the first and longest phase where hair actively grows?

The Anagen Phase is indeed the first and longest stage of the hair growth cycle, where hair actively grows. During this phase, which can last for several years depending on individual genetics and health, hair follicles produce new cells that build the hair shaft. This period is crucial for hair length and thickness, as it is the stage where rapid cell division occurs. The Anagen Phase can vary greatly among individuals, with some experiencing longer phases leading to longer hair, while others may have shorter cycles.

This phase is essential for maintaining a healthy head of hair, and it accounts for approximately 85-90% of the total hair growth cycle. Understanding the Anagen Phase helps estheticians and other beauty professionals in creating effective treatments and routines to enhance hair health and growth.