All are surfactant, pollutant and paraben free but which eco shampoo is best? Ruth Styles put them to the test Much has been said and written about surfactants in shower gels and dodgy colorings in lipstick, but one beauty product that is commonly overlooked is shampoo. But shampoo and other haircare products are one of the beauty industry’s biggest earners, with some to be found in every bathroom in the country. Not surprisingly, annual sales figures are impressive, with haircare worth around £712 million a year, 41 per cent of which comes from shampoo.