Hair is the fastest growing tissue in the body, second only to bone marrow.
A single hair can support up to 100 grams in weight and a whole head of hair could support up to 12 tonnes - the equivalent of two African elephants!
A hair grows by 0.3 to 0.5mm per day - about 1 to 1.5cm a month and 12 to 15cm a year.
African hair grows more slowly and is more fragile than European hair. Asian hair grows the fastest and has the greatest elasticity.
The word shampoo comes from the Hindi 'champna', meaning to massage or knead.
Early hair remedies read like witches' potions. One sixteenth-century doctor claimed to restore hair by applying a mixture of boiled slugs, olive oil, honey, saffron, soap and cumin to the head. But nobody knows if it worked.
Children lose an average of 90 hairs each day, which increases to 120 by old age.
Women often experience major, but reversible, loss of hair two or three months after giving birth. The massive production of the hormone oestrogen during pregnancy puts hair follicles into their 'growth phase'. After the birth, the hormonal balance is restored and the hair follicles go into the 'loss phase', causing a large number of hairs to fall out at once.
African and European people are more prone to balding than Asian people.
Hair is the second fastest growing tissue in the body. Only bone marrow is quicker.
It is possible for your hair to turn white from shock... but not overnight! Hair pigment is produced in the hair shaft beneath the skin, so it would take about 13 days for any white hairs to show.
One centimetre of hair can reveal much about your behaviour in the past month - what you ate, drank and the environments you encountered.
In 2002, men and women in the UK spent more than
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