What is the hair growth cycle?
The hair grows in a cycle, which is why you may see a delay in your hair restoration results. There are four stages of growth, with hair usually growing a quarter-inch per month.
Stage 1: Anagen
During this phase, a new hair shaft is formed. Around 90% of hair follicles are in the anagen stage at any given time.
Stage 2: Catagen
During this 2-week phase, the hair follicles are shrinking. The hair stops growing and begins separating from its blood supply.
Stage 3: Telogen
Here, the hair follicles are at rest. This period may last several months. Within the follicle, new hair is slowly forming. About 10-15% of hair follicles are in this phase at any given moment.
Stage 4: Exogen
In this final stage, the hair falls out. Normal hair loss is about 50-100 hairs within a 24-hour period. After this, the hair returns to its initial anagen phase, completing the cycle.