Sandra Roycroft-Davis

Founder of

Sandra Roycroft-Davis, founder of, is a Harley Street behavioural change specialist. Thinking Slimmer is a world leader in the use of unconscious persuasion to help people change their lifestyle and lose weight.
Sandra qualified as a cognitive hypnotherapist at the Quest Institute and is an NLP Master Practitioner. She has spent years studying the psychology of eating and weight control and has lectured to American university students and recently spoke at a weight loss seminar in the House of Commons.
Thinking Slimmer is an official national partner of Change4Life, the Department of Health’s lifestyle and wellbeing campaign, and is the first company in the world to commission independent clinical trials into the effectiveness of voice recordings using unconscious persuasion to help people lose weight.
Thinking Slimmer is also a stakeholder in the National Institute for Clinical Excellence’s draft guidance for the lifestyle management of obese and overweight adults.
Sandra is married with three teenage children and lives in London.

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