2 Important Topics About Hair Types; How Does the Hair Growth Cycle Happen? Hair growth is a cyclical process that involves three distinct phases: anagen, catagen, and telogen. Each phase has its own characteristics and duration, contributing to the overall growth and shedding pattern of hair.
- Anagen Phase:
- Duration: This active growth phase can last from 3 to 7 years.
- Process: During the anagen phase, cells in the hair bulb divide rapidly. The hair shaft grows approximately 1.25 centimeters per month, translating to about 15 centimeters per year. The length of the anagen phase determines the maximum length of hair.
- Catagen Phase:
- Duration: This transitional phase lasts for about 2 to 5 weeks.
- Process: In the catagen phase, hair growth ceases. The hair follicle shrinks and detaches from the dermal papilla, effectively cutting off the blood supply. This phase marks the end of active hair growth and prepares the hair for shedding.
- Telogen Phase:
- Duration: This resting phase lasts around 2 to 5 months.
- Process: During the telogen phase, hair does not grow but remains attached to the follicle. At the end of this phase, the hair shaft is eventually shed, and the follicle re-enters the anagen phase, starting the growth cycle anew.
The Importance of the Hair Growth Cycle | 2 Important Topics About Hair Types
Understanding the hair growth cycle is essential for identifying and addressing hair health issues. Factors such as stress, hormonal imbalances, nutritional deficiencies, and medical conditions can disrupt the hair growth cycle, leading to hair loss or thinning. Maintaining a balanced diet, managing stress, and seeking appropriate medical advice can help support healthy hair growth.