A witty scientific investigation that reveals how excessive soap and washing harm our health Introducing the new science of skin and a more natural approach to being clean: Our skin plays an essential role in our health. But our understanding of what skin is and how it works is changing. Much of what we think of as cleanliness and skincare might actually be harming it. In Clean specialist in preventive medicine Dr James Hamblin draws on the latest science to offer an exciting new perspective: on our bodies, our health and our relationship with the natural world.