Million dollar idea: Shampoo
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Million dollar idea: Shampoo

Two centuries ago, it was used only by Indians. Nowadays, billions of us use it every day. We're talking about shampoo. The world lathers its way through almost $90bn-worth a year.

But who made it the global way of washing hair? And do we really need to use so much of it? Here's Aaron Heslehurst.

Video journalist: Jeremy Howell

  • 22 Feb 2019
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