The document discusses a new phase in the hair life cycle called the exogen phase. The exogen phase leads to hair shedding as it results in the release of telogen clubs. It is a subphase of the telogen or resting phase, where the hair is passively retained in the follicle before falling out. On any given day, people naturally lose 50-150 hairs due to the exogen phase. Understanding this phase and the natural hair growth cycles can help treat hair loss.

1. EXOGEN PHASE OF HAIR LIFE CYCLE Dr Anastasios Vekris, MD Plastic Surgeon

3. The hair follicle phases

5. The exogen phase