A- “It’s not so much what we put in our shampoo that makes it kinder on eyes,” explains Johnson & Johnson’s Brian Walmsley. “it’s what we leave out.” Adult shampoos contain stronger detergents than our baby products and/or the same mild detergents, but in larger quantities. This is because adult hair is thicker, and so dirtier than a baby’s. Grown-ups also want colourants and conditioners in their shampoos – like silicon. This coats the hair so it feels soft, but is impossible to manufacture in such a way that it doesn’t sting your eyes.