Did you know that the average person has 5 million hairs? Hair grows all over your body except on your lips, palms and the soles of your feet.
It takes about four months for healthy hair to grow an inch. Most hairs grow for up to six years and then fall out. New hairs grow in their place.
Men – and some women – lose hair as they grow older. You can also lose your hair if you have certain diseases, such as thyroid problems, diabetes or lupus.
If you take certain medicines or have chemotherapy for cancer, you may also lose your hair. Other causes are a low protein diet, a family history or poor nutrition.
Our hair is made of a type of protein called keratin. A single hair consists of a hair shaft (the part that shows), a root below the skin, and a follicle, from which the hair root grows. At the lower end of the follicle is the hair bulb, where the hair’s color pigment, or melanin, is produced.
Most people lose about 50 to 100 head hairs a day. These hairs are replaced — they grow back in the same follicle on your head. This amount of hair loss is totally normal and no cause for worry. If you’re losing more than that, though, something might be wrong.
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