The science of hair growth and hair loss.

Explaining the Natural Hair Growth Cycle.

The average person is born with 100,000-150,000 hair follicles on their head. Where are those hair follicles now?

On the floor, your pillow, the shower drain, and your brush. But, is this normal? Typically, the average person sheds 50-100 hairs a day as part of the hair growth cycle. To understand the phases of the growth cycle and how they relate to hair loss, it helps to start with the biology and anatomy of hair.

The Biology and Anatomy of Hair

Hair strands are primarily made up of a protein called keratin and grow from hair follicles in the skin. At the base of each hair follicle is a living bulb. Inside the bulb, active cells divide and grow to create hair. Blood vessels provide nourishment for the bulb and deliver hormones that impact hair growth.

Biology and Anatomy of Hair

The Four Stages of the Hair Growth Cycle

Hair grows at an average rate of a quarter to half-an-inch per month. As your hair grows, individual strands randomly cycle through four, ongoing phases: growing, transitioning, resting, and shedding. Understanding the natural growth cycle of your hair helps explain how disruptions in the cycle can lead to hair loss.

  • Anagen (Growth Phase): This is the active phase of hair growth. As many as 85 to 90 percent [SA2] of the hairs on your head are growing at any given time. Each strand is in the growing phase for 2-7 years.
  • Catagen (Transitional Phase): Over a few weeks, hair growth slows as follicles shrink. About 3% of all hairs are in the transitional phase at any one time.
  • Telogen (Resting Phase): In this phase, the hair follicle is entirely at rest and no longer growing. Around 6 to 8 percent [SA3] of all hair is in the resting phase at any given time. The resting phase typically lasts a few months.
  • Exogen (Shedding Phase): At the end of the resting phase, the hair will gradually detach from the follicle and fall out. Therefore, the average person sheds between 50-100 hairs each day.

It’s important to note that the last three phases (transitional, resting, and shedding) combined take place for approximately 3-4 months. That’s why it takes at least 3-4 months before you start to see results from any topical, laser, supplemental, or surgical treatments for hair loss.

Hair Loss Solutions

Proven Hair Loss Solutions

Everyone’s hair loss is unique, which is why your hair loss solution should be, too. Hair Club has devoted more than 40 years to providing personalized solutions for people of every age at every stage of hair loss. We combine innovative technologies with a team of 1,100+ trained hair health experts and licensed cosmetologists to help you make how you look on the outside match how you feel on the inside. 

The first step to getting your hair back is understanding your level of hair loss. Schedule your complimentary, private consultation with one of our hair loss experts and, together, we’ll identify a customized solution that fits your specific needs and lifestyle.

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