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Normal Hair Growth Rate

author image Andrea Cespedes
Andrea Cespedes is a professionally trained chef who has focused studies in nutrition. With more than 20 years of experience in the fitness industry, she coaches cycling and running and teaches Pilates and yoga. She is an American Council on Exercise-certified personal trainer, RYT-200 and has degrees from Princeton and Columbia University.
Normal Hair Growth Rate
The rate which your hair grows may differ than others. Photo Credit: Tatomm/iStock/Getty Images

When you're trying to grow out a short cut, hair growth seems to take forever. Your hair doesn't grow continuously as your fingernails do. The hair on the scalp goes through three phases of growth. The vast majority of hair on your head is in the anagen, or growing, phase.

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Anagen Phase

During the anagen phase, your primary hair cells divide every 24 hours. Hair in this phase of development grows about 0.35 millimeters daily. Over the course of a 30-day month, this yields approximately a 0.4-inch growth. This phase of growth lasts for two to six years.

Catogen and Telogen Phases

The catogen phase lasts just a day or two and marks the point at which hair growth stops. Just 1 percent or fewer of the hairs on your head are in this phase at any given time. The catogen phase is followed by the telogen phase, the point at which the shape of the hair at the follicle changes to a club shape and the hair prepares to fall out naturally during brushing. This telogen phase lasts three to four months. About 15 percent of your hairs are in this phase at any given time.

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