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Examination of even a single hair can determine whether a person has drugs or other potent substances in his blood, as well as what he has been eating lately.

Contrary to Hollywood movies, it is impossible to determine the s*x of the person to whom it belonged by hair.

On average, hair grows at a rate of about 1 cm per month, although the rate of their growth is influenced by many factors.

The thickest hair is in blondes. They have more hair follicles on the scalp than owners of hair of another color. And least of all - for redheads.

In an adult, about 91-93% of the hair on the head is in the growth stage, and the rest die at the same time. This is a natural process.