Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss

The document provides an overview of the hair growth cycle, detailing the four phases: anagen, catagen, telogen, and exogen. It highlights that the transition from anagen to telogen, which leads to hair shedding, can be influenced by factors such as inflammation, hormones, stress, nutritional deficiencies, poor sleep, and certain medications. Conversely, factors like increased blood flow, direct follicle stimulation, and growth factors can promote the transition from telogen to anagen, encouraging hair growth. The review emphasizes the importance of understanding these transitions and suggests that a holistic approach is necessary to address hair loss effectively.