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How Genetics Determine Hair Growth

Hair growth, a biological marvel, is intricately woven into our genetic fabric. While the desire for luscious long hair often prompts the search for ways to promote hair growth naturally, understanding the nuances of the hair growth cycle and genetic predispositions is paramount.


Woman with Curly Hair


The Hair Growth Cycle:

Hair growth is a cyclical process comprising three main phases: 

  • Anagen (Growth): This active phase sees hair cells dividing rapidly, leading to new hair growth. The duration of anagen is largely genetically predetermined. 

  • Catagen (Transition): A short transitional phase where hair growth slows, and the follicle begins to shrink. 

  • Telogen (Rest): In this resting phase, the old hair is shed, and the cycle begins anew. Approximately 10-15% of our hair is in telogen at any given time. 


Understanding this cycle unveils the challenge of altering our predetermined genetic growth rate. Genetics largely dictate the duration of the anagen phase, influencing how long our hair can potentially grow. 


Genetic Influence on Hair Growth

Our genetic code plays a pivotal role in determining the rate at which our hair grows. While some individuals are genetically predisposed to faster hair growth, others may experience slower growth due to their unique genetic makeup. This intrinsic factor underscores the importance of embracing the natural growth patterns dictated by our genes. Whilst we can't change our predetermined genetic growth rate, there are some things we can do to aid the process.

Promoting Healthy Hair Growth Naturally:

  • Balanced Nutrition: A diet rich in vitamins, minerals, and proteins is vital for optimal hair health. Key nutrients include iron, zinc, biotin, and omega-3 fatty acids. 

  • Scalp Health: A healthy scalp provides an optimal environment for hair growth. Regular cleansing, gentle massage, and the use of Trichologist-approved products contribute to scalp vitality. 

  • Stress Management: Chronic stress can disrupt the hair growth cycle. Incorporating stress reduction techniques like meditation and yoga can positively impact overall well-being. 

  • Avoiding Harmful Practices: Limiting exposure to harsh chemicals, excessive heat styling, and tight hairstyles promotes hair health and minimises damage. 


The Individuality of Hair Growth: A Disclaimed Journey 

It's crucial to acknowledge that while general guidelines exist, the effectiveness of any regimen can vary widely among individuals. Each person's genetic makeup, lifestyle, and overall health contribute to the uniqueness of their hair growth journey. One-size-fits-all advice may not yield uniform results. 


The quest for promoting natural hair growth is an individualised journey guided by genetic predispositions and holistic practices. Our Trichological expertise is a valuable resource for navigating this journey, offering personalised insights and science-backed recommendations


For more information about how we can help, head to our Trichology services page 

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