He is one of the BBC’s leading science presenters having worked on many flagship Health & Science programmes including: Trust Me, I'm a Doctor, Horizon, and The Truth About…, among others. He also co-hosts the hugely successful CBBC series Operation Ouch!

In 2023, Chris published Ultra Processed People, an exposé on the food industry. It became an international bestseller, topping both the UK and US charts. 

Buy Chris' Book

From 2005-2019, he worked half-time for GlaxoSmithKline, as VP Experimental Medicine, focusing on immuno-psychiatry, as described in his best-selling book “The Inflamed Mind” (2018). His scientific work on brain networks and development of mental health disorders has been highly cited. He has been elected as a Fellow of the Royal College of Physicians and the Royal College of Psychiatrists, as a Fellow and Treasurer of the Academy of Medical Sciences, and as an Honorary Fellow of Downing College.

With an illustrious career spanning several decades, Professor Puska has been a driving force behind groundbreaking initiatives aimed at improving population health and advancing preventive measures. Notably, his leadership as the director of the North Karelia Project—an innovative public health undertaking—resulted in significant reductions in cardiovascular diseases through community-based interventions. His work has garnered international recognition and has been instrumental in shaping public health policies on a global scale.

Puska held the position of Director of Non-Communicable Disease (NCD) Prevention and Health Promotion at the World Health Organization (WHO) Headquarters between 2001 and 2003. In 2006, he represented Finland as a candidate for the Director-General position of WHO. From 2010 to 2013, he served as the Chancellor of the University of Turku. He has also served as President of World Heart Federation (WHF) and President of the International Association of Public Health Institutes(IANPHI).

As the President of the European Society of Preventive Medicine, Professor Puska will spearhead efforts to further elevate the role of preventive medicine in promoting health and wellbeing across Europe and beyond. His visionary leadership and deep understanding of preventive strategies are poised to guide the ESPM in addressing emerging health challenges, fostering collaborations, and advocating for evidence-based policies.

Professor Puska has M.D and M.Pol.Sc. degrees and PhD in epidemiology and public health. Among several honours are Honorary Doctorate at St. Andrew’s University (Scotland) and Lisbon University, as well as Academician of the Russian Academy of Sciences. He has received, among other things, WHO’s annual Health Education Award (1990), WHO Tobacco Free World Award (1999), the Nordic Award for Public Health (2005), the Rank Prize (2008) and the Ancel Keys Award by ACLM (2019).

Stephanie conducts one-to-one nutritional therapy clinics in Surrey and Online offering a comprehensive assessment of her patients’ health issues to then provide detailed, personalised health protocols. With specialist interest in digestive health and the effect of the gut microbiome on metabolic, hormonal and mental health conditions, Stephanie works with numerous GPs supporting treatment plans for challenging cases with eating disorders, metabolic chronic disease and cancer, both pre, during and post treatment.

For 9 years Stephanie was head of nutrition at Grayshott Medical Spa and clinical lead for the 7-day digestive health regime that she co-developed in 2012. Her gut health protocol is the inspiration behind GutGastronomy, a cookbook based on her gut healing philosophy. Since the closing of Grayshott Medical Spa in November 2020, Stephanie has relocated the health programme to Goodwood Estate, where it is now run as a 5 day, fully immersive experience at the Goodwood hotel and spa.

Stephanie contributes to various health publications; is often featured in the media as a health expert and is on the Advisory Board of the SATCC cancer charity. Stephanie published her first book in 2017 called ‘Why Eating Less & Exercising More Makes You Fat!’, which explains why conventional weight loss advice fails and what to do instead to achieve permanent health and weight loss goals. She has also co-authored a book on Super-Foods with doctor of biochemistry and health campaigner, Dr James DiNicolantonio, and following her recent training in Nutritional Neuroscience, has written her soon to be published latest book ‘Eat Your Brain Happy’, which focuses on the critical role of gut health, food, sleep, exercise and other factors known to directly influence the health of the brain.

Stephanie has also recently embarked on a degree in canine nutrition and well-being, bringing together her love of dogs and health.

Jessie is the founder of the wildly popular Instagram account @GlucoseGoddess, where she teaches over two million people about transformative food habits. She holds a BSc in mathematics from King’s College, London, and an MSc in biochemistry from Georgetown University.