90. Rhiannon Lambert — Registered nutritionist and author

Rhiannon Lambert has become one of the most recognizable faces in the world of UK nutrition.

A best-selling author and founder of leading private nutrition clinic Rhitrition, based on London's prestigious Harley Street, she has emerged as a leading voice in the fight against fad diet culture, regularly dispelling nutrition myths for her 140,000 Instagram followers and "Food for Thought" podcast listeners.

Formerly a classically trained soprano, Lambert is now a Master Practitioner in Eating Disorders and Obesity having obtained a diploma approved by The British Psychological Society (BPS) from The National Centre For Eating Disorders and diplomas in sports nutrition and pre and postnatal nutrition. Her first book, "Re-Nourish: A Simple Way To Eat Well," was a bestseller, and her new book, "Top Of Your Game," co-authored with number one snooker player Ronnie O'Sullivan, came out in May 2019.