Camel urine, considered an ancient Islamic 'remedy' from the time of the Prophet Mohammed, has become big business for men and women in Yemen.

The urine has become fashionable recently among Yemen's young people, who claim that it strengthens the scalp, slows hair loss and promotes healthy hair.

According to the Arab TV network al-Arabiya, hair salons throughout the country are requesting this precious 'tonic' and selling it at four dollars a litre - a high price considering the income level of most of the buyers.

"I have been using camel urine since I have been going to elementary school," said Amal, a university student in Sanaa.

"The first time a neighbour told me that she had been using it (urine) for many years, because it made her hair more beautiful and shiny. Now everyone in my home uses it."

"Many young men use the camel's urine. I am forced to buy large quantities for my business," said Hasan, a barber.