Many people believe they can do anything to their hair because its dead anyway. Is this true?
Well yes and no.
The hair outside of your scalp is psychologically dead; it has no blood, nerves or muscles. When you cut it there is no pain, and it does not bleed.
However, for a dead fiber, it is quite remarkable. Healthy hair can be stretched up to 30% of its length, can absorb it own weight in water and can increase its diameter by 20%. We can change its color, its shape, curl it, wash it, brush it, set it, pull it and rub it to an amazing degree.
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