About us
Clementine Vaughan is a London based Dietitian and the founder of Third Sister. She helps women on GLP-1 medications such as Mounjaro, Wegovy and Ozempic manage the gut side effects that make treatment hard to stick with: nausea, constipation, bloating, diarrhoea and reflux. Too many women are told these symptoms are normal and to push through. At Third Sister we believe no one should have to suffer to get the results they're working toward.
Her background is in gut health and women's health. In addition to her dietetic training she has British Menopause Society training and a Graduate Certificate in Clinical Hypnosis, which she uses for gut-directed hypnotherapy.
In 1:1 consultations, Clem starts with a full assessment and deals with the most pressing symptoms first. From there, she helps clients protect their muscle, build eating habits that fit their lives, and plan for dose changes or coming off the medication well. She also offers the GLP-1 course with the GLP-1 Success Academy, a self-paced programme for women who want expert guidance in their own time.
Visit thirdsister.co.uk to download her free guide, 5 Simple Rules to Eat Well on GLP-1s, or to book a call.
Training, qualifications & experience
- Registered Dietitian with the HCPC since 2017.
- Member of the British Dietetic Association (BDA) since 2017.
- Master’s in Nutrition and PG Dip in Dietetics from King’s College London.
- Graduate certificate in Clinical Hypnosis from Birmingham City University (2026).
- Completed clinical training at St George’s Hospital and Guy’s and St Thomas’ Hospital.
- 5+ years of professional experience in the food & beverage and FoodTech industries across the UK and Asia.
- Founded my women’s health dietetic practice in February 2024 to support women taking GLP-1s.
Member organisations *
school Registered / Accredited
Being registered/accredited with a professional body means an individual must have achieved a substantial level of training and experience approved by their member organisation.
The HCPC are an independent, UK-wide health regulator. They set standards of professional training, performance and conduct for 14 professions. They keep a register of health professionals who meet their standards, and they take action if registered health professionals fall below those standards. They were created by a piece of legislation called the Health Professions Order 2001. Registration means that a health professional meets national standards for their professional training, performance and conduct.
Nutrition topics
info Information about health conditions (*)
Nutritional therapy can help enhance the well-being of individuals diagnosed with serious medical conditions, but should not take the place of medical treatment and advice. If you have been diagnosed with - or suspect you may have - any of these conditions, please speak to your doctor before starting nutritional therapy or making any major changes to your diet or lifestyle.
Photos & videos
Fees
£250.00 per session
Health Insurance/EAP
Additional information
Please check directly with your health insurer to find out if your sessions are covered.
When we work
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