Welcome to The Leading IBS and Functional Gut clinic in London

We are the longest established IBS Clinic based in London and in the UK. Our IBS and Gut specialists provide consultations and functional gut testing for IBS  and Gut health including  SIBO testing.

IBS Specialists as featured in the Guardian

IBS Specialist London

Are you looking for a reliable IBS Clinic? Are you fed up of feeling bloated? Do you have urgency or constipation and Gas?

Functional Gut Specialist London

Our functional gut  clinic specialise in helping people with symptoms of Irritable Bowel Syndrome (IBS) as well as Candida, SIBO, Parasites and Leaky Gut using Functional Medicine in London and all over the UK.

If you are looking  for treatment of symptoms of IBS and other gut symptoms  such as pain, diarrhoea, constipation, wind, belching, acid reflux or bloating, our clinic may be of great benefit to you.

We can help you understand the root causes of IBS and help you with the most appropriate gut tests, supplements and tailored dietary advice.

We are proud to have been featured in The Guardian

Please feel free to read more about us our success stories and reviews

How does your IBS treatment differ to the NHS?


Most of the patients we see at our functional gut clinic, have already been to the NHS and had a diagnosis of Irritable bowel syndrome. Please read our article on Secrets the NHS does not tell you.

Most of them tell us they are highly dissatisfied with the outcome and have not seen any improvement in their symptoms.

Often, they are told by their GPs that there is nothing else that can be done for them and are palmed off with a prescription.

Unfortunately, many patients continue to experience, painful and troublesome IBS symptoms, including bloating, diarrhoea, pain, constipation or brain fog and fatigue.

Typically the NHS will offer antispasmodics such as Mebeverine, or fybogel, Peppermint capsules and sometimes antidepressants.

Sadly this approach rarely appears to work. If dietary advice is given, a very restrictive Low-Fodmap diet seems to be the only advice offered.


What type of Tests to you recommend for IBS?

We offer Gut microbiome tests as well as tests designed to address gut dysbiosis including  Parasite testing, SIBO tests and Candida tests.

We also offer testing for Intestinal Permeability and Leaky gut and  have a wealth of experience in the field of functional medicine.

Where is your clinic located?

Our IBS specialists work in London on Harley Street and  Weymouth Street can provide Online consultations all over the UK and internationally.


We are members of the British Association of Nutritional Therapists- BANT


Complementary & Natural Healthcare Council CNHC and


Graduates from GI Advanced Practice Module From the Institute of Functional Medicine

We were established 23 years ago and have a wealth of clinical experience working with thousands of IBS patients  all over the UK and worldwide.

If you are looking for expert advice for your gut health, please contact us.

We have been one of the leaders in the field of digestive disorders and were featured in the Guardian and have won awards with CAM.

Step 1

Book a consultation.

You will be able to speak to your practitioner for a one hour in depth about your symptoms and ask questions. This is paramount to the healing process and will ensure the best outcomes. We will take the time to fully understand the possible causes and triggers of your symptoms.

If you have any test results please bring send these to us in advance,

Step 2

In some cases we may recommend tests for Candida, Parasites, Dysbiotic bacteria, Small Intestinal Bacterial Overgrowth or food intolerances. Testing will help pinpoint the cause of symptoms of IBS.

Step 3

Once  your test results are ready we will devise a supplement and tailored diet programme for you.

Here is a list of some of the areas that we explore at our clinic when looking for possible causes to IBS:


Yeast overgrowth (sometimes called Candida)


Small Intestinal Bacterial Overgrowth


Unfriendly bacteria


Parasite Testing


Food intolerances

Sometimes only one is to blame. In many cases, 2, 3 or even 4 of these causes are all present in the same person. Unfortunately, people seldom look at more than one. That’s analogous to having four nails in your shoe. If you only get rid of one of them it will still hurt to walk!



What types of  IBS Symptoms can you help?

We work with many symptoms including:




Bad Breath


Loose stools


Brain fog






What causes IBS?

There is still no known cause of IBS. Some of the areas that may be linked to your symptoms include:

Gut dysbiosis and Changes in your Gut Microbiome

Your large intestine is composed of multiple strains of bacteria, yeast or fungi and also viruses. If these microbes become out of balance this is termed as gut dysbiosis and may lead to IBS. We can help you restore balance through supplements and dietary modifications and sometimes we use Gut microbiome tests.


Food Poisoning and tummy bugs

Post-Infectious IBS can develop after gastroenteritis or severe food poisoning. This may manifest with loose stools  that do not seem to improve.  This can lead to a condition known as small intestinal bacterial overgrowth. If appropriate we will provide you with diagnostic testing for SIBO and offer you professional advice on how to eradicate the bacteria through diet and supplements.


Food Intolerances

Are you confused about which foods may trigger your IBS symptoms? Many patients have tried diets such as the Low FODMAP diet but are unsure about which types of foods to avoid. We can help you identify offending foods and provide tailored dietary advice.



Stress can be an aggravating factor for many patients, but rather than being the underlying cause, it exacerbates symptoms.



Test for IBS

We offer a number of IBS tests that may help identify underlying causes of IBS. These include SIBO Tests & Gut Microbiome tests as well as Parasite and Candida tests.

We also offer blood tests for IBS including food intolerance testing.  Not everyone will require IBS testing. But in some cases tests may helpful to understand the best form of treatment.

 Do you need help with Diet and IBS?

In some cases IBS may be triggered by food intolerances, these vary greatly from patient to patient and can be very confusing.

We will work with the you  to find the absolutely right individual diet,  avoiding the foods that trigger symptoms, and substituting others that will provide the utmost nutritional benefits but avoid provoking any symptoms. Improvements in health can be very quick.

We were fortunate enough to come runner-up in the CAM Awards  for Outstanding Practice. We have been trying hard to maintain this standard ever since, and have worked hard to provide our patients with the best possible cutting-edge help, advice and information.

We are IBS specialists, truly dedicated to finding the cause of your digestive symptoms and finding the best IBS treatments for you.


We can provide you with IBS testing, supplement advice and a dietary plan to restore your digestive health. We are providing consultations virtually via zoom, and in our clinic on Harley street.   We can provide  IBS test kits by post or at our clinic.

Please feel free to visit our ‘About Us’ page for more information.

Where is your Clinic located?

Our IBS Treatment Clinic is an online clinic based in central London,  Harley Street, but we can  help people all over the UK and International clients by means of Zoom, Skype /telephone consultations.

What Happens during the consultation?





What type of IBS testing do you offer at your clinic?

The main tests that we use to identify possible causes of IBS include:

Small Intestinal Bacterial Overgrowth (SIBO) -(Hydrogen breath testing)

This test will identify if you have an overgrowth of bacteria in the small intestine. This condition is extremely common in patients with IBS and can include symptoms of bloating, wind, flatulence as well as constipation or diarrhoea. If this sounds like you, please do look at our page on ‘SIBO Testing’.

Parasite Testing

We offer Comprehensive Parasite tests and Stool Analysis Tests to detect parasitic infections inflammation, viruses, bacteria, digestive function, occult blood and white blood cells. Please have a look at our pages on ‘Parasites’.

Organic Acid Testing - (urine)

This is an excellent, easy to use test to detect yeast (candida) as well as bacterial overgrowth in your urine.

CSA - Comprehensive Stool Analysis

We offer the most innovative and sophisticated IBS tests including PCR tests, GI MAP test, GI effects and G1360 as well as Helicobacter testing. These are quite different to tests offered on the NHS. For more information please see our ‘Gut Bacteria Test’ page.

Food intolerance blood testing

Many of our clients symptoms can be linked to the foods that there are eating. We often use elimination diets to help them unravel the common offenders. We do this in conjunction with IgG blood test that looks at food intolerances. This can be very helpful as a guide to understand what foods are causing bloating pain constipation or diarrhea and other symptoms.

Candida Testing - (Blood, Saliva, Stool or urine)

Candida may also be linked with brain fog, fatigue, fermentation, bloating as well as constipation and diarrhoea. The main causes of a yeast overgrowth are linked to antibiotic use as well as diets high in sugar and yeast (marmite, bread, alcohol). If this sounds like you please look at our page on ‘Candida Testing’.

We can use stool urine or blood tests to test fungal and yeast overgrowth. The best test will depend very much on your specific case and we will give you professional advice. As regards treatment for Candida, we will also recommend anti-fungal supplements as well as dietary changes.

What is the Best diet for IBS?

There are several diets we use for patients with irritable Bowel syndrome including:


Low-Fodmap diet


Anti-Candida diet


Bi-Phasic diet


Low Histamine diet


Gluten-Free diet


Elimination diets


GAPS diet


Specific Carbohydrate diet


Paleolithic / Stone-Age diets


Dairy-free diet

Of course every case is different, so we will tailor the best diet for you based on your individual symptoms and medical history.

There’s no one-size-fits-all diet! These diets can often be challenging to adhere to on your own so we will ensure you have an easy guide to follow.

How long have you been helping patients with IBS?

We have been helping people with their health since 1999 when Michael Franklin established the IBS and Gut Disorder Centre.

Sadly Michael Franklin passed away in 2014 but Victoria Tyler is the IBS specialist that continues to sees patients with IBS and digestive problems at her IBS clinic in central London.

Our practice was runner-up in the 2009 CAM Awards for Outstanding Practice.

What approach do your IBS specialists take?

Our IBS specialists always look at the many possible root causes of IBS – we have found that for many patients there can more than one cause.

For example we often find that patients who have small intestinal bacterial overgrowth may also have underlying food intolerances as well as a fungal overgrowth!

What are the symptoms of IBS?

The patients we see have a wide spectrum of symptoms ranging from:








fullness after eating














skin issues


feeling the need to urinate frequently

Causes of IBS

What we do is look at the possible root causes of IBS as this may be a better way to help those suffering irritable bowel syndrome and truly understand what is causing your symptoms.

Please click the following link, ‘The Real Causes of IBS’, to read Positive Health magazine’s cover story article written by Michael Franklin.

Please take a look through the ‘The causes of IBS’ and success stories appearing on this website. They all contain details of cases from our IBS and Gut disorder Centre and mention some of the IBS treatments we use.

We particularly help people suffering from Candida, SIBO, and Yeast overgrowth as well unusual bacteria such as Klebsiella and Citrobacter freundii, from parasites such as Blastocystis hominis and Dientamoeba fragilis, and from yeast overgrowth such as Candida albicans and Geotrichum. We often use the ‘CSA- Comprehensive Stool Analysis’ and Comprehensive Parasitology Tests, PCR tests to help us identify the most effective treatment of IBS and associated conditions. These tests are a huge breakthrough in IBS treatment.