Marlisa Swillus has made her hobby into her vocation: writing, cooking, and enjoying food are her greastest passions. A nutritionist, author and member of the Food Editor's Club, Marlisa has ran cookery sections for food magazine's for many years and has published more than 30 books. Doris Fritzsche is a nutritional therapist consultant and author of many books and newsletters. She has worked as a research assistant at the Institute of Nutritional Science. She joined a medical practice specialising in diabetes, and has also given lectures on various aspects of health and nutrition.