Dr Joshi counts Gwyneth Paltrow, Cate Blanchett among his many fans, while his detox and lifestyle books are best-sellers.
Dr Rupal Shah works as a GP in Battersea, London.
Chris Inglefield has been a consultant plastic and reconstructive surgeon in the NHS since 1998. He now works at the London Bridge Hospital Breast Clinic.
Joanna Hall is the UK's leading fitness, diet and lifestyle expert.