The global hair care market is big business, with billions spent on shampoos and conditioners across the world each year. The major cosmetics companies are profit-driven, and they make some impressive claims about what in their bottles. But can these claims be substantiated? This program explores the science behind hair care to bust the greatest beauty myths. Do you need to change shampoos because your hair builds up a tolerance? How often should you wash your hair? And what really involved in a hair transplant? This revealing film sorts the pseudoscience from the credible claims.