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Science-backed hair regrowth insights, expert product reviews, and educational content for effective hair loss solutions. Trusted by readers in the United States and Europe.

Based in the United States — Evidence-based hair loss information following AAD & FDA guidelines.

About the Author

Maya Castillo is a US-based, US-trained hair science writer and research editor specializing in hair growth, scalp health, and evidence-based wellness. She follows AAD (American Academy of Dermatology) guidelines and translates complex scientific research into practical guides to help readers make informed decisions about their hair health.

maya.castillo@besthairregrowth.comLearn more about Maya →

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Science

Understanding the Hair Growth Cycle: Key to Effective Regrowth

Learn how your hair growth cycle works and why targeting the anagen phase is essential for hair regrowth treatments to succeed.

D

Dr. Emily Hartman, MD, FAAD

November 1, 2025
November 1, 2025
6 min read
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Published
November 1, 2025
Last updated
Nov 8, 2025
Diagram of hair growth cycle stages
Diagram of hair growth cycle stages

Affiliate Disclosure: This article contains affiliate links. We may earn a commission at no extra cost to you.

Stages of Hair Growth

Hair grows in three main phases: anagen (growth), catagen (transition), and telogen (resting). The anagen phase determines how long your hair can grow and typically lasts 2–7 years. Treatments like minoxidil extend this phase, promoting thicker strands.

Why the Hair Cycle Matters for Regrowth

Understanding the hair cycle helps identify when and how treatments work. For example, early shedding after starting a new routine often means follicles are transitioning into active growth. A 2023 review in the Journal of Dermatological Science confirmed that stabilizing the anagen phase improves long-term density.

How to Optimize Your Hair Cycle

Maintain scalp health through gentle exfoliation, balanced nutrition, and consistent topical treatments. Avoid harsh chemicals and chronic stress, which can push follicles into telogen prematurely.

Recommended US Products

These evidence-based hair loss treatments are available in the United States and have been reviewed for safety and efficacy:

  • •Rogaine (Minoxidil) - FDA-approved topical treatment
  • •Keeps - Subscription-based hair loss solutions
  • •Hims - Comprehensive hair care products and treatments
  • •Nutrafol - Science-backed hair growth supplements
  • •Vegamour - Plant-based hair wellness products

Always consult with a US-licensed dermatologist or healthcare provider before starting any new treatment. Products mentioned are for informational purposes only.

Have Questions?

Consult with a dermatologist or healthcare provider before starting any new hair loss treatment. Always read labels and follow instructions carefully.

Coming soon...

Table of Contents

  1. 01.Stages of Hair Growth
  2. 02.Why the Hair Cycle Matters for Regrowth
  3. 03.How to Optimize Your Hair Cycle

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