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Quick Answer
A hair follicle cycle reset occurs when a resting follicle re-enters the anagen (growth) phase and starts producing new hair. This process depends on healthy follicles and can be supported by adequate nutrition, balanced hormones, stress management, and good scalp care. While temporary shedding may improve as the cycle stabilises, damaged or scarred follicles cannot naturally restart hair growth.
A hair follicle cycle reset happens when a resting hair follicle re-enters the hair growth cycle and begins a new anagen (growth) phase. This transition is influenced by your overall hair follicle health, with factors such as balanced hormones, adequate nutrition, reduced stress, and healthy blood circulation helping create the conditions that support new hair growth.
Evidence published in Nature Reviews Molecular Cell Biology explains that the hair growth cycle is regulated by signalling between hair follicle stem cells and their surrounding microenvironment (niche). When these biological signals favour regeneration, resting follicles can re-enter the anagen phase, initiating a new cycle of hair growth.
What Is the Hair Growth Cycle?
The hair growth cycle is a continuous process in which each hair follicle grows, rests, sheds, and regenerates. Because every hair follicle cycle runs independently, your hairs are naturally in different stages at the same time.
Your hair growth cycle has four stages:
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Anagen (Growth Phase): Your hair actively grows for 2 to 7 years, with 85% to 90% of your scalp hairs in this phase at any given time.
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Catagen (Transition Phase): Your hair stops growing and detaches from its blood supply during this short phase, which lasts about 10 days to 2 weeks.
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Telogen (Resting Phase): Your hair rests for around 3 months while the follicle prepares to grow a new hair beneath the existing strand.
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Exogen (Shedding Phase): Your old hair sheds naturally as a new hair continues the cycle. Losing 50 to 100 hairs a day during this phase is a normal part of healthy hair renewal.
Can You Reset the Hair Growth Cycle?
Yes, you can help reset the hair growth cycle if your hair follicles are still healthy and have not been permanently damaged or scarred.
In simple terms, this means supporting hair follicles as they move from the telogen (resting) phase back into the anagen (growth) phase, where new hair growth begins.
The hair growth cycle resets through the following biological changes:
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Healthy follicles respond: Hair follicles in the telogen phase can re-enter the anagen phase, but permanently scarred follicles cannot regrow hair naturally.
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Underlying triggers improve: Addressing factors such as stress, nutritional deficiencies, or hormonal imbalances can help support a healthier hair growth cycle.
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Hair regrowth takes time: You may notice less shedding first, while visible hair regrowth usually takes several months as the new growth cycle progresses.
Although "hair follicle cycle reset" is a commonly used term, it is not a formal medical term. Biologically, it refers to healthy hair follicles transitioning from the telogen (resting) phase back into the anagen (growth) phase.
Which Ingredients Support the Hair Growth Cycle?
Several ingredients support the hair growth cycle through different mechanisms, such as prolonging the anagen phase, improving scalp circulation, regulating hormones, or correcting nutritional deficiencies.
If your hair follicles remain healthy, certain evidence-based treatments and nutrients may help support different stages of the hair growth cycle. The table below summarises how they work.
|
Ingredient |
Category |
Primary Role in the Hair Growth Cycle |
|
Minoxidil |
Prescription / OTC Topical |
Prolongs the anagen (growth) phase and shortens the telogen (resting) phase. |
|
Finasteride |
Prescription Medication |
Lowers scalp DHT levels by inhibiting 5-alpha-reductase. |
|
Caffeine |
Topical Serum / Additive |
Stimulates follicle cell activity and supports scalp microcirculation. |
|
Rosemary oil |
Essential Oil |
Improves scalp microcirculation and may help reduce DHT-related hair thinning. |
|
Copper peptides |
Topical Serum |
Support blood vessel formation and encourage follicles to re-enter the growth phase. |
|
Vitamin D |
Vitamin Supplement |
Supports normal hair follicle cycling through vitamin D receptor activity. |
|
Iron (Ferritin) |
Mineral Supplement |
Supports rapidly dividing hair matrix cells and healthy hair growth. |
|
Zinc |
Mineral Supplement |
Supports protein synthesis, keratin production, and healthy follicle function. |
|
Biotin |
Vitamin Supplement |
Helps restore normal hair growth when a biotin deficiency is present. |
Note: Prescription treatments such as finasteride and, in some countries, minoxidil should only be used under appropriate medical guidance. Vitamins and minerals are most beneficial when correcting a confirmed nutritional deficiency rather than as routine supplements.
When Can You Expect Hair Regrowth After Excessive Hair Shedding?
Hair regrowth after temporary excessive shedding (telogen effluvium) usually begins within 3 to 6 months, while fuller hair density gradually returns over 6 to 12 months.
Most cases improve once the underlying trigger has resolved, although recovery varies from person to person. Your hair regrowth timeline after the trigger typically looks like this:
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Months 1 to 3: Hair shedding usually begins 2 to 3 months after a physical or emotional trigger, such as illness, high fever, nutritional deficiency, or significant stress.
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Months 3 to 6: Excessive shedding gradually slows as the underlying trigger resolves and the hair growth cycle begins to stabilise.
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Months 4 to 6: Fine baby hairs may begin to appear as hair follicles re-enter the anagen (growth) phase.
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Months 6 to 12: Hair density, length, and thickness continue to improve as normal hair growth resumes.
If excessive hair shedding continues for more than 6 months or worsens over time, consult a dermatologist to identify ongoing causes such as nutritional deficiencies, thyroid disorders, or other underlying conditions.
What Cannot Reset the Hair Growth Cycle?
Not every type of hair loss can be reversed by resetting the hair growth cycle. The following conditions usually require medical treatment or cannot regrow hair naturally:
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Scarring alopecia (permanent scarring): Inflammatory conditions that permanently destroy hair follicles and replace them with scar tissue cannot be reversed naturally and require early medical treatment.
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Untreated androgenetic alopecia: Without appropriate treatment, progressive follicle miniaturisation can continue over time.
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Shaving the hair shaft: Shaving changes the length of the hair but does not affect the hair follicle cycle or stimulate new hair growth.
How Can You Support a Healthy Hair Follicle Cycle?
You can support a healthy hair follicle cycle by eating a balanced diet, following a gentle scalp care routine, and maintaining healthy daily habits.
While these steps cannot treat every type of hair loss, they help create the right conditions for normal hair growth. The following habits can help support a healthy hair growth cycle:
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Eat a nutrient-rich diet: Include enough protein, iron, zinc, biotin, and vitamins D and C to support healthy hair growth.
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Massage your scalp: Gently massage your scalp for 5 to 10 minutes each day to support healthy blood circulation and overall hair follicle health.
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Wash your hair gently: Use a mild shampoo and lukewarm water, and choose a washing routine that suits your scalp type.
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Limit heat and tension: Reduce heat styling and avoid tight hairstyles to minimise hair damage and breakage.
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Manage stress: Chronic stress can push hair follicles into the telogen (resting) phase, increasing hair shedding.
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Stay hydrated: Drink enough water to support overall scalp and hair follicle health.
Traya's Perspective on Hair Growth Cycle
A healthy hair growth cycle depends on identifying and treating the underlying cause of hair loss. While good nutrition, scalp care, stress management, and healthy lifestyle habits can support normal hair growth, they may not be enough to treat medical hair loss.
At Traya, we believe in improving long-term hair health by identifying and treating the root cause, rather than relying on temporary solutions alone.
If you're experiencing excessive hair shedding or slow hair regrowth, the Traya Hair Test can help identify the factors affecting your hair growth cycle and recommend a personalised treatment plan based on your hair and health profile.
Frequently Asked Questions
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What stimulates new hair follicle growth?
Healthy hair follicles can re-enter the anagen (growth) phase when underlying factors such as nutritional deficiencies, stress, or hormonal imbalances are addressed.
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How do you trigger the hair growth phase?
You can support the anagen phase by maintaining good nutrition, managing stress, practising gentle scalp care, and treating the underlying cause of hair loss.
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How can you tell if your hair is regrowing?
Early hair regrowth often appears as fine, short hairs, while hair shedding gradually decreases and overall hair density improves over time.
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What are the big three for hair regrowth?
The "big three" commonly refers to minoxidil, finasteride, and ketoconazole for pattern hair loss. They should be used under medical guidance when appropriate.
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Can damaged hair follicles grow back?
It depends. Healthy hair follicles can produce new hair, but permanently scarred or destroyed follicles cannot regrow hair naturally.
References
Schneider MR, Schmidt-Ullrich R, Paus R. (2009). The Hair Follicle as a Dynamic Miniorgan. Current Biology.
Malkud, Shashikant (2015). "Telogen Effluvium: A Review." Journal of Clinical and Diagnostic Research.
Zhang, Bing; Chen, Ting (2024). "Local and Systemic Mechanisms That Control the Hair Follicle Stem Cell Niche." Nature Reviews Molecular Cell Biology.
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