Dr Sarah Brewer is one of the UK's most prolific and respected doctor columnists. She is also the author of several health titles, including The Complete Book of Men's Health and High Blood Pressure for Thorsons.

Michelle Berriedale-Johnson studied history at Trinity College, Dublin before starting her own catering business specialising in historic feasts. She is the author of a number of food history titles. In the late 1980s, she became involved with food allergy and nutrition, and she has worked as a writer, publisher and a food consultant, devising therapeutically, nutritionally and gastronomically acceptable dairy, gluten and egg free dishes both for individuals and for commercial production.