Megan Rossi

Megan Rossi (born 10 October 1988) is a dietitian, nutritionist and author specialising in the microbiome. Her PhD in gut health received the Dean's Award top 5% for Outstanding Research Higher Degree.

Rossi founded the website The Gut Health Doctor, including The Gut Health Clinic. In 2019, she co-founded Bio&Me a food range in the UK. In 2025, she founded SMART STRAINS, a range of clinically proven live bacteria products with clean labelling. She is an advocate and researcher of plant-based nutrition.

Early life and education One of three children, Rossi was raised by her single mother, a science teacher, on a farm near Cairns in rural Australia.

Rossi studied Dietetics at Queensland University of Technology from 2006 to 2009. After receiving first-class honours, she went on to conduct more research into the field while working as a dietitian at Princess Alexandra Hospital, Brisbane. In 2014, she earned her PhD in gut health from the University of Queensland while also working as a nutritionist for the Australia Olympic Synchronised Swimming team.

Rossi moved to London, UK in 2015, where she lives with her husband Thomas and her sons Archie and Cooper.

Career

Research fellow Rossi is a Research Fellow at King's College London looking at nutrition-based therapies in gut health, including prebiotics and probiotics, dietary fibres, plant-based diversity, the low-FODMAP diet and food additives. She has published over 50 scientific papers in International peer-reviewed journals.

The Gut Health Doctor In 2017, Rossi established an online presence as The Gut Health Doctor (@theguthealthdoctor with over 600,000 followers across various social media platforms), with a focus on linking gut health with other health concerns such as mental health, heart disease, kidney disease and skin conditions.

The Gut Health Clinic Rossi founded The Gut Health Clinic, which includes a team of gut specialist dietitians, for clinical conditions such as IBS, IBD, coeliac disease and other gut disorders, as well as weight management, diabetes, cancer and women's health.

Bio&Me Rossi co-founded Bio&Me in 2019, a food range with a focus on gut health. The company was named UK Future Brand of the Year 2021, has won several Great Taste Awards, and has received investment from Harry Kane. The company achieved B Corp Status in 2022.

SMART STRAINS Rossi founded SMART STRAINS in 2025, clinically proven live bacteria supplement range ). 2019 Business Insider's Top 100 Coolest People in Food & Drink. 2020 Young Australian Achiever of the Year in the UK, from the Australian High Commission for her contribution to science and public education. 2023 LDC Top 50 Most Ambitious Business Leaders 2024 Hurun UK Under 35s Young Entrepreneurs to Watch

Plant-based nutrition

Rossi has noted that there are a number of different plant-based diets including veganism, lacto-vegetarianism, lacto-ovo vegetarianism, pescetarianism and flexitarianism. She has stated that a plant-based diet does not have to be vegan and can occasionally include meat but the bulk of the diet must be built around plant foods. Rossi has commented that she does not personally promote a vegan or vegetarian diet. Her advice is to eat more plants but not eliminate entire food groups. According to Rossi, "including some animal foods in your diet can be a valuable way to decrease your risk of nutritional deficiencies - I am in no way antimeat".

Rossi has argued that a plant-based diet is the opposite of a fad diet, it is a sustainable way to eat a healthy diet. She has stated that the main focus of a plant-based diet should be on whole foods, including whole grains, fruit, vegetables, legumes, nuts and seeds. (UK, Australia & Europe) and Love Your Gut (US & Canada), was published in September 2019. The book features recipes and advice on IBS and bloating, diagnosing food intolerances, and the relationship between gut health, sleep and exercise. The book was dedicated to her older sister, Justine, who died aged 5 in a playground accident. It was a Sunday Times bestseller The book suggests eating 30 different plant-based foods a week. The editors of the book commented that "based on the latest gut-health science, all of the recipes are packed with plants, but you’ll still find meat, dairy and eggs in there, because it’s all about diversity—eating more, not less. Megan’s love of food shines through every page and we can’t wait to see people enjoying her tasty creations".

Media

TV

Rossi has a regular gut health segment on ITV's This Morning show. Appeared on 'Dr Xand's Con or Cure' (2023 and 2024 ) on BBC 1. She has also appeared on Lorraine, BBC Morning Live, ITV Tonight (2020), Sky News and ITV's What You Need To Know.

News Media

From 2022-2023, Rossi had a weekly column in The Daily Mail. She appears on BBC Radio 4 Inside Science and, the Chris Evans Breakfast Show on Virgin Radio. She contributes to the Guardian, the Telegraph, Marie Claire and Stylist magazine. She regularly delivers keynote presentations at New Scientist Live and other health conferences.

Podcasts

Rossi appears on Stompcast, The Power Hour and The Doctor’s Kitchen. She has also appeared on TED Health, Feel Better Live More, The Mid•Point, Slo Mo.

Selected publications

Eat Yourself Healthy: An Easy-to-Digest Guide to Health and Happiness from the Inside Out (Penguin Life, 2019) Love Your Gut: Supercharge Your Digestive Health and Transform Your Well-Being from the Inside Out (The Experiment, 2021) Eat More, Live Well: Enjoy Your Favourite Food and Boost Your Gut Health with The Diversity Diet (Penguin Life, 2021) How to Eat More Plants: Transform Your Health With 30 Plant-Based Foods Per Week (And Why It’s Easier Than You Think) (The Experiment, 2022)