Human hair growth has three phases anagen catagen and telogen which last 2 7 years 10 20 days and 100 days respectively

Human Hair Growth Phases: Anagen, Catagen, and Telogen

Have you ever wondered why some people can grow their hair incredibly long, while others seem to struggle with short hair no matter what they do? Well, the answer lies in the three different phases of hair growth: anagen, catagen, and telogen. Each phase plays a crucial role in determining the length and health of our beloved locks.

Anagen Phase (Lasting 2-7 Years)

The first and longest phase of hair growth is called the anagen phase. This phase can last anywhere from two to seven years, depending on various factors such as genetics, age, and overall health. During anagen, your hair follicles are actively producing new cells, resulting in visible hair growth.

The length of the anagen phase is vital in determining how long your hair can grow. People with a longer anagen phase can grow their hair much longer compared to those with a shorter anagen phase. Interestingly, genetics primarily dictate the duration of this phase, which means that some individuals are genetically predisposed to have shorter anagen phases and, consequently, shorter hair.

Catagen Phase (Lasting 10-20 Days)

After the anagen phase comes the catagen phase, which is significantly shorter, lasting only about ten to twenty days. During catagen, the hair follicles start to transition and prepare for the next phase. The hair follicles detach from the blood supply and shrink in size. While no noticeable hair growth occurs during the catagen phase, it is a crucial moment for the health and vitality of your hair.

Telogen Phase (Lasting 100 Days)

The final phase of the hair growth cycle is the telogen phase, which lasts for approximately 100 days. This phase is often referred to as the resting phase since the hair follicles are in a dormant state. During telogen, the old hair is released and slowly pushed out by new hair growing underneath. It is normal to shed around 50 to 100 hairs daily during this phase.

When the telogen phase is complete, the hair follicles reenter the anagen phase, and the cycle repeats itself. It’s important to note that the duration of each phase can vary from person to person. Factors such as age, genetics, hormonal changes, and overall health can influence the length of these phases and subsequently affect hair growth patterns.

Understanding the different phases of hair growth is essential, not only for those who wish to achieve long and healthy hair but also for professionals in the field of hair care and cosmetic science. By comprehending the intricate mechanisms behind hair development, experts can develop effective products and treatments to stimulate hair growth and maintain overall hair health.

This article has been written based on information from the Library of Congress. For further details, you can visit https://www.loc.gov/everyday-mysteries/biology-and-human-anatomy/item/why-does-hairturn-gray/.