Glossary

Advanced glycation end products (AGEs)

Bacterial overgrowth (stool context)

Coeliac disease (autoimmune gluten intolerance)

Continuous glucose monitoring (CGM)

GERD (Gastro-oesophageal reflux disease)

Gut-associated lymphoid tissue (GALT)

Healthy fats and glycaemic response

Hydrochloric acid (stomach acid)

Inflammatory bowel disease (IBD)

Inflammatory response to glucose

Intestinal barrier dysfunction

Irritable bowel syndrome (IBS)

Lupus (systemic lupus erythematosus)

Pathogenic bacteria (stool testing context)

Polycystic ovary syndrome (PCOS)

Premenstrual dysphoric disorder (PMDD)

Short-chain fatty acids (SCFAs)

Small intestinal bacterial overgrowth (SIBO)

Small Intestinal bacterial overgrowth (SIBO) [duplicate]

Total short-chain fatty acids (SCFAs)

Zonulin (stool/clinical context)

Debbie Ketelaars

4 August 2026

Working with Kate Osborne at Gut Insight has made a significant difference to my digestive health. I’ve had two sessions so far where she attentively listened, identified the underlying issues, and recommended natural supplements that restored my regularity and gave my digestion much-needed targeted support. I thoroughly recommend her services to anyone struggling with digestive issues.

Rhys Lewis

26 July 2026

Over the years, Kate has helped me on my weight loss journey. Her approach has always been unfailingly pragmatic, understanding and rooted firmly in the evidence. She really knows her “stuff” and goes the extra mile each and every time to do the best for her clients. If you’re looking for any support with diet, weight, or another condition which could benefit from a nutritional approach, I highly recommend Kate!

Debbie Stuart

23 May 2026

I went to Kate with some long term gut issues that had been affecting my quality of life for many years. Her knowledge and expertise was immediately apparent as she helped me to understand what was contributing to these problems. She has suggested recipes and supplements, as well as small lifestyle changes which have all helped enormously and made a huge difference to my wellbeing. I would highly recommend her - thank you Kate!

Karen Blakeley

5 May 2026

Kate was wonderful. I had tried everything I could to get rid of my bloating. It was only when she diagnosed SIBO and helped to treat it that the bloating disappeared and my flat tummy returned. She is warm and caring and I cannot recommend her highly enough

Mippy

21 April 2026

As a medical doctor I highly recommend Kate to people needing help with gut issues. Her background with a leading Functional Medicine testing laboratory means she has expert knowledge of what to look for and how to interpret the results to get people back to optimal health. She is a highly experienced professional, with a warm, kind manner.

Jolieke Peters

2 April 2026

Kate has really great and expansive knowledge of anything to do with gut health, nutrition and food. I've really enjoyed the recipes she has shared, and the advice she has given has been so helpful. Besides her professional experience and knowledge, she is also a very kind, caring and lovely person who makes you feel at ease straight away and who you can talk to about more difficult subjects like your gut health without any embarrassment or shame. I highly recommend her!

Emily Duncombe

28 March 2026

I had a really positive experience and would highly recommend Kate. Her level of expertise was clear from the start—she explained everything in a way that was both knowledgeable and easy to understand, which immediately put me at ease. What really stood out was how friendly and approachable she was; she created a welcoming environment where I felt completely comfortable asking questions and discussing my concerns. Kate took the time to listen carefully and provided thoughtful, well-informed advice that felt tailored to my situation rather than generic. Her professionalism combined with a warm, personable manner made the whole experience genuinely reassuring. Highly recommended!

Jeremy Warshaw

26 March 2026

I have been working with Kate for a few weeks now and I can vouch first-hand for her smarts, empathy, and learning when it comes to gastric matters. I was diagnosed with SIBO and have been working with Kate ever since. I can honestly say that my symptoms are almost 100% gone and I’m eating more healthfully and feeling so much better. And the wonderful thing is that it hasn’t been at all difficult. She is aware of everything from what the gut needs to work optimally to the discipline needed to get there. She encourages you to be fully invested in your own recovery and no detail is too small for her consideration. She has helped me eat more mindfully and slowly and to treat food as a precious element in one’s health journey. You feel like you have her full attention, that you are in very good hands, and that she’s your biggest cheerleader. You are not alone when Kate is on your side.

Madi Farcas

25 March 2026

I appreciated how clear and structured the process was. I finally felt like I was getting to the root of the digestive issue instead of just guessing.

Lydia Lotus

I went to Gut Insight after struggling with bloating and digestive discomfort for a long time. Kate took the time to understand my symptoms and explained things clearly. I left feeling reassured and with practical next steps.