8 things you didn't know about your hair

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If you think you know everything there is to know about your hair, think again. These 8 facts may just blow your mind, or at least make you rethink the extent of your hair knowledge.


1
When wet, a healthy strand of hair can stretch an additional 30% of its original length.

2
Hair grows slightly faster in warm weather, because heat stimulates circulation and encourages hair growth.

3
Hair contains information about everything that has ever been in your bloodstream, including drugs.

4
Black is the most common hair color. Red is the rarest and only exists in about 1 percent of the world’s population, with blonde hair found in 2 percent.

5
Balding only begins to become visible once you’ve lost over 50 percent of the hairs from your scalp.

6
A single hair has a lifespan of about five years.

7
Eighty percent of Americans wash their hair twice a day.

8
Each strand of hair can support up to 100 grams in weight. Your entire head of hair could support the weight equivalent to two elephants.