In the UK over £9 billion a year are spent on beauty products that promise to improve and transform us. But how much of what these products promise is based in scientific evidence, and how much is simply marketing manipulation?　　Cherry Healey teams up with independent scientists to put everyday cosmetics to the test like never before. In a groundbreaking study carried out by the University of Sheffield, and with the help of 25 volunteers, she discovers that moisturisers might not have the benefits people think they do. …