Understanding the hair growth cycle is essential for diagnosing and treating hair loss effectively. Each stage of the hair cycle plays a unique role in hair growth, and treatments often need to be tailored depending on which phase is most affected.
The Four Stages of the Hair Cycle
- Anagen (Growth Phase)
The anagen phase is the active growth period, lasting 2 to 6 years. Around 85-90% of scalp hairs are in this phase at any given time. Hair length depends on how long hair remains in anagen. Treatments that stimulate growth, such as Minoxidil and low-level laser therapy, are most effective during this phase, particularly for those experiencing hair loss.
- Catagen (Transition Phase)
This short phase lasts 1-2 weeks. Hair growth stops, and the follicle shrinks in preparation for shedding. There are currently no direct treatments targeting catagen, but supportive therapies can help maintain healthy follicles as they transition.
- Telogen (Resting Phase)
Lasting about 3 months, this phase sees the follicle at rest. Around 10-15% of hairs are in telogen at any time. Telogen effluvium, a common form of hair shedding triggered by stress, illness, or hormonal changes, occurs when too many hairs enter telogen, affecting individuals with hair loss concerns. Treatments often focus on correcting the underlying cause and supporting regrowth.
- Exogen (Shedding Phase)
Exogen is when old hairs are released and new hairs begin to grow. Normal daily shedding (50-100 hairs) occurs here. Abnormal shedding may require medical evaluation to identify nutritional deficiencies, hormonal imbalances, or scalp conditions, especially when hair loss becomes noticeable.
Why Different Stages Require Different Treatments
Since hair follicles behave differently in each stage, a personalized treatment plan is crucial when addressing hair loss issues. For example:
- Stimulating new growth (anagen) requires growth-promoting therapies.
- Managing excessive shedding (telogen or exogen) focuses on addressing triggers like stress or nutritional gaps.
- Hormonal therapies like Finasteride work best for genetically-driven hair loss affecting follicle cycles long-term.
Conclusion
At Holistica Health, we evaluate the hair cycle stage during your telehealth consultation, creating custom treatments that target your specific type of hair loss for optimal results.
