Science

Why does hair go grey and what makes urine yellow?


Why does hair go grey?

A hair is basically a tube filled with cells and pigment with spaces in between. When the hair is young, the spaces are filled with fluid and this keeps the pigment in place, so your hair keeps its colour. As we get older, our skin doesn’t produce hair quite so well and the spaces become filled with air. The pigment is lost and the hair gradually becomes white. 

Why do your hands go wrinkly in the bath?



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