#305 How to Choose the Right Probiotic for You and How They Work with Dr. Megan Rossi
9th Jul 2025
Let’s unpack the world of probiotics. What they are, how they work, and who might actually benefit from taking them.
Today you’ll learn about the science behind probiotic strains, explore whether fermented foods like kefir and kimchi are enough, and discuss when probiotics may help with issues like IBS, supporting our immune health, or even preventing antibiotic related side effects.
To help us with this complicated topic, we have Dr Megan Rossi on the show today. She’s the founder of The Gut Health Doctor®, and is one of the most influential gut health specialists internationally, and a leading Research Fellow at King’s College London. She’s a registered dietitian and nutritionist but Dr Megan has an award-winning PhD in Probiotics.
She is also the founder of the gut health food brand, Bio&Me, and she has launched a targeted range of clinically-proven live bacteria supplements, SMART STRAINS®.
Dr Megan also shares how to navigate the supplement aisle with confidence, what to look for on a label (such as the Genus, Species and Strain), and how probiotics compare to other foods with probiotic-like effects and other foundational gut health habits like fibre and plant diversity.
You can find Dr Megan on Instagram or learn more at theguthealthdoctor.com.
There is no financial affiliation of any kind with Doctor’s Kitchen and Dr Megan’s brand of probiotics.
Helpful resources
Episode guests
Dr Megan Rossi, founder of The Gut Health Doctor®, is one of the most influential gut health specialists internationally, and a leading Research Fellow at King’s College London. A registered dietitian and nutritionist for over fifteen years, Dr Megan has an award-winning PhD in Probiotics, which was recognised for its contribution to science, receiving the Dean’s Award for outstanding research.
Dr Megan Rossi founded The Gut Health Clinic in 2019, where she leads a team of gut-specialist dietitians, working directly with clients in their face-to-face clinics in London and Manchester, alongside delivering virtual consultations to an international clientele.
She is also the founder of the multi-award-winning gut health food brand, Bio&Me, which aims to bridge the gap between science and the food industry and, most recently, she has launched a targeted range of clinically-proven live bacteria supplements, SMART STRAINS® to revolutionise how people understand and use live bacterial supplements.
(Smart Strains Instagram)
Megan is also the author of multiple Sunday Times bestselling books, including her most recent, Eat More, Live Well (UK, Aus & Europe) and How To Eat More Plants (US & Canada).
References/sources
- World Gastroenterology Organisation’s (WGO) probiotic guidelines
- High-Fermented-Food Diet Study (Cell 2021, PMID: 34256014)
- Probiotic Product Guide (UK)
- Infant colic (Cochrane Review, PMID: 30865287)
- Infant colic (J Pediatr Gastroenterol Nutr, PMID: 36219218)
- Cold & flu (Cochrane review, PMID: 36001877)
