Stewart has over 25 years’ experience in the beauty and healthcare industry, with particular expertise in product testing and claim substantiation. A biochemist, he started his career at Unilever, researching fundamental aspects of skin function to develop more effective moisturisation and antiaging products. He then joined Boots, where over a 12 year career, he was responsible for leading claims innovation and new methodology, managing the Product Claims Department and becoming Skincare Scientific Adviser across all Boots brands globally. He joined Cutest after nearly 6 years with Dow Corning where he held the roles of Global Leader for Skincare followed by Global Leader for Medical Devices. He is a former President of the Society of Cosmetic Scientists, holds several patents and has published several scientific papers. His current role is as Chief Executive of Cutest Systems Ltd, one of the longest established CROs specialising in claims and safety testing for personal care, medical device and pharma companies, having been established nearly 40 years ago.