SIBO and Rosacea

By Dr Magnus Lynch
MA(Cantab) DPhil(Oxon) MRCS FRCP
Consultant Dermatologist & Dermatological Surgeon
Last updated 2025-11-28

There is evidence for a connection between gut health and skin health, often referred to as the "gut-skin axis." Small Intestinal Bacterial Overgrowth (SIBO), a condition where there is an excessive amount of bacteria in the small intestine, has been shown in some studies to be more common in people with rosacea.

In my view the evidence for a causal link is currently weak, but it is possible that this position may change over time as more research is done.

How can I help

I see patients in person in central London. An in person consultation allows me to examine the skin directly including features that are difficult to capture in a photograph such as 3-dimensional changes and textural change. This is the better option where the diagnosis is uncertain, where previous treatment has not been effective, or where a procedure is being considered. For more straightforward conditions such as acne and rosacea a remote consultation with clear photographs can be a good option.

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About Dr Magnus Lynch

MA(Cantab) DPhil(Oxon) MRCS FRCP

I am a London-based Consultant Dermatologist and Dermatological Surgeon. I am highly experienced in skin cancer diagnosis, Mohs micrographic surgery, acne, rosacea, acne scarring and laser treatments. I studied at the Universities of Cambridge and Oxford, and completed my dermatology training and Mohs fellowship at the prestigious St John's Institute of Dermatology. I graduated from medical school in 2003 and have worked exclusively in Dermatology since 2012.

I lead a research team at King's College London investigating the molecular biology of skin cancer. In recent years I have been involved in Media Appearances, including the Channel 5 series 'Skin A&E', where I perform skin surgeries and treat various skin conditions.

My NHS practice is at Guy's Hospital. I consult with private patients at OneWelbeck (near to Bond Street station) and on Harley Street. Book A Consultation.