Dr. Clare Bailey is a general practitioner doing diet research with Oxford University. She is the author of The 8-Week Blood Sugar Diet Cookbook, and is married to Dr. Michael Mosley, author of The Clever Gut Diet, The Fast Diet, and The 8-Week Blood Sugar Diet. She is also founder of Parenting Matters, an organization that helps parents become more confident through courses and one-to-one consultations.

Dr. Sarah Schenker is a Registered Dietitian and Nutritionist who has served on both professional and government committees. She now combines her sports nutrition work, consulting for football clubs in the UK, with regular appearances on television and writing for scientific journals, as well as for newspapers, magazines, and websites.

Dr. Michael Mosley (1957—2024) was the #1 New York Times bestselling author of The FastDiet, FastExercise, FastLife, The 8-Week Blood Sugar Diet, The Clever Gut Diet, and The Fast800 Diet. Dr. Mosley trained to be a doctor at the Royal Free Hospital in London before joining the BBC, where he spent three decades as a science journalist and executive producer. He became a well-known television personality and won numerous television awards, including an RTS (Royal Television Award), and was named Medical Journalist of the Year by the British Medical Association.