From food to fashion, the thriving market in human hair

There's no such thing as a bad hair day for some people.
Not for the chef using it to get the perfect pizza crust, or the fashion designer charging up to £20,000 for clothes created using human hair. Certainly not for the hairdresser charging up to £2,500 for extensions.

Human hair is now big business in the UK and US and other parts of the world. It's also extremely lucrative for some. American comedian Chris Rock explores the international trade in his new documentary film Good Hair, released in this country on Friday.