# First Aid for Your Gut > English-language knowledge base on chronic gut problems: causes, testing and recovery for IBS, ulcerative colitis, Crohn's disease and persistent digestive symptoms. First Aid for Your Gut was founded by Jeroen le Duc, an orthomolecular therapist specialising in gut problems. He was diagnosed with Crohn's disease himself and has lived without symptoms and without medication for over ten years. He writes the articles on this site. Our starting point: a diagnosis such as IBS, ulcerative colitis or Crohn's disease describes what is happening, not why. We look for the underlying causes in food, gut flora, digestion and lifestyle, and we work alongside conventional care, never instead of it. The information on this site is educational and does not replace medical advice. Contact: https://firstaidforyourgut.com/free-intro-call/ ## Start here - [First Aid for Your Gut: find the cause of your gut problems](https://firstaidforyourgut.com/): Chronic gut problems with no clear cause? We look for the why behind your symptoms, then build a personal plan around food, gut flora and lifestyle - [Free Gut Scan](https://firstaidforyourgut.com/gut-scan/): Answer 22 questions and receive a personal profile with insight into your gut issues. Free, in 4 minutes, no account needed. Discover the cause of your... - [Gut Scan: understand your gut issues](https://firstaidforyourgut.com/gut-scan-quiz/): Answer 22 short questions and discover what is behind your gut issues. Free, in 4 minutes ## Conditions and symptoms - [Articles](https://firstaidforyourgut.com/articles/): Evidence-based articles on ulcerative colitis: nutrition, natural anti-inflammatories, gut healing, and lifestyle strategies that support remission - [Bloating: why your belly swells up](https://firstaidforyourgut.com/bloating/): Belly bloated after eating? Find out why bloating is a signal from your digestion, and what is really going on inside your gut - [Chronic gut issues: causes and testing](https://firstaidforyourgut.com/chronic-gut-issues/): Chronic gut issues without a clear diagnosis? Discover the causes, which tests can help, and what you can do yourself to reduce symptoms - [Constipation and a Lazy Bowel](https://firstaidforyourgut.com/constipation/): Struggling with constipation or a lazy bowel? Find out the role of serotonin, stress and your microbiome, and what your gut really needs - [Crohn's disease](https://firstaidforyourgut.com/crohns-disease/): Everything about Crohn - [Crohn's: Incurable or Misunderstood?](https://firstaidforyourgut.com/crohns-disease-causes-and-recovery/): Is Crohn - [Dientamoeba fragilis: the most common gut parasite](https://firstaidforyourgut.com/dientamoeba-fragilis/): Dientamoeba fragilis is the most common gut parasite behind ongoing gut symptoms. Read the symptoms and how a stool test detects it - [Fatty Liver (NAFLD): Causes and Recovery](https://firstaidforyourgut.com/fatty-liver-nafld/): A fatty liver (NAFLD) is your liver under long-term overload. Read why your liver gets fatty, why gallbladder problems are often a liver problem, and what... - [Fermented foods and your gut flora](https://firstaidforyourgut.com/fermented-foods/): Fermented foods can support your gut flora, but the effect differs from person to person. Explore yoghurt cultures, kefir, sourdough and ginger beer - [Gut issues after antibiotics](https://firstaidforyourgut.com/gut-issues-after-antibiotics/): After a course of antibiotics, gut issues can linger for a long time. Read why your gut flora doesn't recover on its own and what you can do about it - [Gut issues: symptoms and recovery](https://firstaidforyourgut.com/gut-issues/): An overview of gut conditions: Crohn - [IBD: Incurable, or Misunderstood?](https://firstaidforyourgut.com/inflammatory-bowel-disease/): IBD, including Crohn - [Irritable bowel syndrome (IBS): causes and recovery](https://firstaidforyourgut.com/irritable-bowel-syndrome-causes-and-recovery/): Diagnosed with irritable bowel syndrome (IBS)? Discover why IBS is not an end point but a starting point, and which factors cause your symptoms - [Irritable Bowel Syndrome (IBS)](https://firstaidforyourgut.com/irritable-bowel-syndrome/): Everything about IBS: causes, the role of your microbiome, testing options and what you can do yourself. Discover the way to recovery - [Lactose Intolerance: Symptoms and Causes](https://firstaidforyourgut.com/lactose-intolerance/): A lactose intolerance does not always have to be permanent. Read the symptoms, the cause, how to test for it and what you can do about it - [Milk kefir and your gut flora](https://firstaidforyourgut.com/kefir/): Milk kefir is a living symbiosis of yeasts and bacteria that turns milk into a fresh, fizzy drink. How it works, how to care for it, and how it differs... - [Sourdough and your gut flora](https://firstaidforyourgut.com/sourdough/): Every sourdough starter is unique. Meet a few tried-and-tested traditional cultures, how to keep them alive, and why sourdough is often easier to digest - [Stomach Pain After Eating: Causes](https://firstaidforyourgut.com/stomach-pain-after-eating/): Stomach pain after eating? Find out why the problem often is not in the food, but in how your digestion works, and where it goes wrong in the chain - [Stress and gut issues: what happens in your body](https://firstaidforyourgut.com/stress-and-gut-issues/): What does stress do to your gut? Read how stress affects your digestion and can contribute to gut issues such as diarrhoea and bloating - [Sugar and Your Gut: How It Harms Your Health](https://firstaidforyourgut.com/sugar-and-your-gut/): Refined sugar disrupts your blood sugar, your gut bacteria and your immune system. Read how sugar contributes to SIBO and gut symptoms, and what you can... - [The ginger beer plant and your gut flora](https://firstaidforyourgut.com/ginger-beer/): The ginger beer plant is a living culture for real ginger beer. How to make it, and what fermented food can mean for your gut flora - [The Gut Microbiome and Your Symptoms](https://firstaidforyourgut.com/the-microbiome/): How a disrupted gut microbiome can throw your digestion off balance and contribute to symptoms like gas and diarrhoea. Read what your gut flora does and... - [The Gut-Brain Axis: Gut, Mood and Depression](https://firstaidforyourgut.com/the-gut-brain-axis/): Your gut and your brain are connected all day long. Read how a disrupted gut can contribute to low mood, anxiety and a foggy head, and what you can do... - [Traditional yoghurt cultures and your gut flora](https://firstaidforyourgut.com/yoghurt-cultures/): Traditional yoghurt cultures like Filmjolk, Viili and Matsoni renew themselves week after week. Learn what sets them apart and how to keep one alive at... - [Ulcerative Colitis: Chronic or Misunderstood?](https://firstaidforyourgut.com/ulcerative-colitis-causes-and-recovery/): Is ulcerative colitis really chronic and incurable? Discover the factors behind the inflammation, the role of your gut microbiome, and why living... - [Ulcerative colitis](https://firstaidforyourgut.com/ulcerative-colitis/): Everything about ulcerative colitis: causes, the role of your microbiome, testing options and how recovery is possible - [What is the low-FODMAP diet, and does it work?](https://firstaidforyourgut.com/low-fodmap-diet/): Does the low-FODMAP diet work? Learn what it is, which foods are high in FODMAPs, the downsides, and why it eases symptoms but does not fix the cause ## Testing and guidance - [Blood test for gut issues](https://firstaidforyourgut.com/blood-test/): Targeted blood testing gives you valuable insight into how your body works. Discover deficiencies and the causes of your symptoms - [DNA test for gut issues](https://firstaidforyourgut.com/dna-test/): A DNA test gives you insight into your personal blueprint. Discover genetic factors that may explain your symptoms - [Food intolerance test](https://firstaidforyourgut.com/food-intolerance-test/): Does your gut react to almost everything you eat? Discover how a food intolerance test can help you find your hidden triggers - [Free intro call](https://firstaidforyourgut.com/free-intro-call/): Book your free 30-minute intro call with Jeroen. Understand what is really going on with your gut. No sales pitch, just insights that move you forward - [Personal guidance for gut issues](https://firstaidforyourgut.com/personal-guidance/): Six months of personal guidance for gut issues. A therapist and nutrition specialist work together on your recovery. Focused on results, not a ticking... - [Rates](https://firstaidforyourgut.com/rates/): See the rates at First Aid for Your Gut. Free intro call, IBS Recovery Programme €1.499, Crohn & Colitis Recovery Programme €1.799. Honest and clear - [Request a food intolerance test](https://firstaidforyourgut.com/request-food-intolerance-test/): Discover which foods irritate your gut. Choose from IgE and IgG tests with various options. Request and pay directly - [Request testing](https://firstaidforyourgut.com/request-testing/): Request a food intolerance test or stool test yourself. Get clarity about what is happening in your gut - [Stool test](https://firstaidforyourgut.com/stool-test/): Did you know a specialised stool test can reveal a great deal about your digestion? Discover everything we test for ## About us - [About Jeroen: My story with Crohn's disease](https://firstaidforyourgut.com/about-jeroen/): The personal story of Jeroen le Duc: from my Crohn - [Claire Vulto: Orthomolecular gut therapist, Den Haag](https://firstaidforyourgut.com/our-team/claire-vulto/): Claire Vulto, orthomolecular gut therapist specialised in IBS, parasites and gut health. Online consultations worldwide, in English and Dutch - [Debby Blauwendraat: Orthomolecular therapist, Amsterdam](https://firstaidforyourgut.com/our-team/debby-blauwendraat/): Debby Blauwendraat, orthomolecular therapist specialised in gut complaints and the nervous system. Online guidance worldwide, in English and Dutch - [From fear and exhaustion to trust in my body](https://firstaidforyourgut.com/from-fear-and-exhaustion-to-trust-in-my-body/): Sandra (34) lived with ulcerative colitis for ten years. Read how she regained trust in her body - [Functional nutrition coach](https://firstaidforyourgut.com/vacancy-functional-nutrition-coach/): Join us as a functional nutrition coach. Help clients with gut issues make food and lifestyle changes that last. Online, self-employed. Apply by video - [Functional nutrition practitioner](https://firstaidforyourgut.com/vacancy-functional-nutrition-practitioner/): Join us as a functional nutrition practitioner specialised in gut health, Crohn - [Gut complaint experiences from real people](https://firstaidforyourgut.com/experiences/): Read personal stories from people who lived with gut complaints for years and regained control over their body - [I felt sicker from the medication than from the disease](https://firstaidforyourgut.com/i-felt-sicker-from-the-medication-than-the-disease/): Dirk (54) lived with Crohn - [I felt this couldn't be the whole story](https://firstaidforyourgut.com/i-felt-this-couldnt-be-the-whole-story/): Gio (35), a nurse, was told food would not matter. Read how she found another path for herself and her child - [I now know what my body needs](https://firstaidforyourgut.com/i-now-know-what-my-body-needs/): Ilona (55) walked around with IBS complaints for years. Read how understanding her gut brought calm and energy - [Jan Roosjen: Orthomolecular therapist for Crohn's](https://firstaidforyourgut.com/our-team/jan-roosjen/): Jan Roosjen, orthomolecular therapist specialised in chronic gut complaints and Crohn - [Jeroen le Duc: Orthomolecular therapist specialised in Crohn's](https://firstaidforyourgut.com/our-team/jeroen-le-duc/): Meet Jeroen le Duc, founder of First Aid for Your Gut. Recovered from Crohn - [Join our team](https://firstaidforyourgut.com/join-our-team/): Work with us online as a functional nutrition practitioner or coach, specialised in gut issues, Crohn - [My gut never did what it should. Until now](https://firstaidforyourgut.com/my-gut-never-did-what-it-should-until-now/): Chantal (53) lived with Crohn - [My life revolved only around my gut](https://firstaidforyourgut.com/my-life-revolved-only-around-my-gut/): Annemiek (31) lived with ulcerative colitis. Read how she regained control over her body and daily life - [My life was about anticipating and controlling](https://firstaidforyourgut.com/my-life-was-about-anticipating-and-controlling/): Renske (43) had lived with Crohn - [Orthomolecular nutrition specialist](https://firstaidforyourgut.com/orthomolecular-nutrition-specialist/): Our orthomolecular nutrition specialist helps you adjust your diet and lifestyle to recover from gut issues. Personal guidance that fits your situation... - [Orthomolecular therapist](https://firstaidforyourgut.com/orthomolecular-therapist/): Looking for an orthomolecular therapist who specialises in gut issues? Our team of 7 therapists investigates the cause of your symptoms and guides you... - [Our team of gut specialists](https://firstaidforyourgut.com/our-team/): Meet our team of 7 orthomolecular therapists, specialised in gut complaints, IBS, Crohn - [Rianne Persoon: Orthomolecular therapist, gut complaints](https://firstaidforyourgut.com/our-team/rianne-persoon/): Rianne Persoon, orthomolecular therapist specialised in gut complaints, chronic stress and energy problems. Online guidance worldwide, in English and Dutch - [Tamara Harberts: Children's nutrition coach & gut therapist](https://firstaidforyourgut.com/our-team/tamara-harberts/): Tamara Harberts, orthomolecular children - [The Book](https://firstaidforyourgut.com/the-book/): First Aid for Your Gut by Jeroen le Duc: 215 pages of practical insight into gut health. The English edition launches on 11 November 2026. Sign up to be... - [The Poo Times](https://firstaidforyourgut.com/the-poo-times/): Sign up for The Poo Times, the newsletter from First Aid for Your Gut. Receive regular insights about gut health, nutrition and recovery - [Yvonne Kok: Orthomolecular epigenetic therapist, gut complaints](https://firstaidforyourgut.com/our-team/yvonne-kok/): Yvonne Kok, orthomolecular epigenetic therapist specialised in gut problems and gut health. Online consultations worldwide, in English and Dutch ## Terms - [Disclaimer](https://firstaidforyourgut.com/disclaimer/): Read our disclaimer on using the information on firstaidforyourgut.com. Our content is for information only and does not replace medical advice