What is the hair cycle?
The hair cycle refers to the continuous process of hair growth, regression, rest, and shedding through the anagen, catagen, telogen, and exogen phases.
Disruptions in this natural cycle contribute to hair loss conditions. Therapies like Photobiomodulation (PBMT) help normalize cycle timing, extending growth phases and shortening rest periods.
Supporting a balanced hair cycle is a core objective of red light therapy for hair restoration, improving follicle longevity and scalp coverage over time.
Related terms
Exogen phase
Biological Concepts
The exogen phase is the part of the hair growth cycle when hair fibers are shed from the follicle as a natural renewal process.
Dihydrotestosterone (DHT)
Biological Concepts
Dihydrotestosterone (DHT) is a potent androgen hormone linked to hair follicle miniaturization and androgenetic alopecia (AGA).
Telogen phase
Biological Concepts
The telogen phase is the resting stage of the hair cycle when hair follicles are dormant before shedding and renewing their growth cycle.
Anagen phase
Biological Concepts
The anagen phase is the active growth stage of the hair cycle during which hair follicles produce new hair.
