Theresa Cheung is a full-time writer specialising in nutrition and women's health and lifestyle issues. She holds a Masters Degree from King's College Cambridge and, prior to writing and research, worked as a health and fitness consultant. Her previous books include The Menopause Diet, The PCOS Diet Book, You Can Beat PMS and Pregnancy Weight Management. Theresa also regularly contributes features to women's magazines, such as Red, She, Prima and You Are What You Eat.Dr Marilyn Glenville MA, PhD is a Fellow of The Royal Society of Medicine, a nutritional therapist, psychologist, author and broadcaster who obtained her doctorate from Cambridge University. She is also a member of the Nutrition Society. For over twenty years Dr Glenville has studied and practised Nutritional Therapy, both in the UK and in the USA, specialising in the natural approach to female hormone problems. She has had several papers published in scientific journals, frequently advises health professionals and often lectures at academic conferences. She is also a popular international speaker. As a respected author on women's health care she gives regular talks on radio and has often appeared on television and in the press. She is the author of four internationally best selling books.