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Growth Stages Of The Hair Explained

Even though hair growth follows the same biological rules for everyone, it doesn’t do so at the same time for everyone. Each hair on your head has its own timetable. If all the hair follicles were on the same schedule of dying off, then all your hair would fall out at the same time and grow back at the same time again.

There are three known stages each hair goes through from development to death. These growth stages of the hair are called the Anagen Phase, the Catagen Phase and the Telogen Phase. Once each hair cycle has run its course, the new cycle begins.

Although there are variations from person to person, hair grows about one half inch each month, in general.

Anagen Phase: Growth hair growth stages

Hair growth begins at its very root, the papilla. This papilla is seated deeply within the dermis. The anagen phase has a predetermined time to grow that can last for several years. It is genetically programmed how long a hair should remain in this phase, the longer it lies dormant, the faster it should grow once it becomes active.

When hair is in this stage, most of the action takes place inside the dermis. The papilla of each hair divides so that an arteriole and a venule can enter into the papilla for oxygen exchange and nutrient delivery. At any point in time, there is more than eighty percent of hair in the anagen phase. Typically if someone has thinning hair or wants to make hair grow "faster", the focus is elongating the Anagen stage with thinning hair products.

Catagen Phase: Transition

The phase that follows is the catagen phase. This is the genetically determined signal for the hair follicle to decrease in size. Once the follicle gets smaller, the papilla begins to detach itself from the rest of the hair. Now the hair shaft has no way of receiving nourishment from the circulation. The shaft of the hair is being pushed out of the scalp, giving the hair an additional little bit of length even though it is not actually growing any longer.

Telogen Phase: Dormancy

The last phase of hair growth is called the telogen phase. It can also be termed resting phase since that is, essentially, what it is. The follicles take a break from working to produce hair.

This interlude can last between one to perhaps four months until the hair is ready to enter the anagen phase once again. The hair that is still in the follicle from the catagen phase, will then be pushed out by the newly growing hair. At any given time, around twelve or thirteen percent of hair are in the hair growth cycleelogen phase. This is an excellent stage to ensure the follicles receive all the nutrition needed to resume growth. Hair growth vitamins for women and men introduce the biotin, niacin, B complex vitamins the papilla needs restore health growth.

Interrupted Hair Growth

Certain factors may be inhibiting the normal growth of hair, such as genetics, DHT, malnutrition, stress, hygiene and drugs. These factors affect the entire scalp area. Some fungal diseases may affect only patches of scalp, where fungal disease kills the hair follicles and leaves round patches of bald spots.

Other causes of hair loss are due to simple traction (traction alopecia). When hair is pulled too tightly in one direction, like a very tight pony tail in young girls, it may pull hair out. This happens frequently simply because of the tension to which the hair is subjected is usually confined to the area of the hair line.



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