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The leading website for food intolerances and food allergies.

Fructose, Lactose & Histamine


On this free to use website, you can find useful information about lactose intolerance, fructose malabsorption, histamine intolerance, gluten intolerance or coeliac disease, and much more. The information provided is subject to stringent quality criteria.

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Symptoms of coeliac disease

The classic symptoms of coeliac disease (celiac disease) are chronic diarrhoea, partly with heavy and also, due to the dysfunctional fat digestion, greasy-looking sticky stool (steatorrhoea), pain in the joints and muscles, loss of appetite and vomiting. Some patients experience the appearance of small itchy blisters on the skin.

Children often suffer from FTT (failure to thrive) and stunted growth.

You should absolutely NOT be observing a gluten-free diet BEFORE your visit to the medical professional! This can influence the measurement readings and makes it impossible to obtain an accurate diagnosis!

gluten_intolerance_symptomsSymptoms of coeliac disease can include the following:

  • Bloating
  • Diarrhoea (also constipation)
  • Unusual stool consistency, in other words greasy stool
  • nausea and vomiting
  • Headaches
  • Muscle pain (especially in the limbs)
  • pain in stomach
  • weight loss (not in all cases)
  • aphthous ulcers
  • hair loss
  • osteoporosis
  • ...

Further along the line consequences such as infertility, erectile dysfunction, depression and schizophrenic disorder appear. But there is no need to worry as these cases are rare in people who live with untreated coeliac disease. Here, too, it is essential to get a personal appointment with a medical professional!

The degree of sensitivity to gluten and the intensity of the symptoms vary individually. Some people only experience minor symptoms, such as stomach ache and constipation, even if they eat larger amounts of foods containing gluten. On the other hand there are sufferers who will react even to the smallest trace of gluten with severe symptoms.

There has been a significant change in the identification of this syndrome since the introduction of screening for antibodies in the blood specifically connected to coeliac disease. An exact diagnosis can, however, only be determined through a small intestine biopsy (also known as small bowel biopsy).


1) Keller, R.: Klinische Symptomatik: Zöliakie, ein Eisberg. In: Monatsschrift Kinderheilkunde 2003; 151:706-714
2) Österreichische Arbeitsgemeinschaft Zöliakie
3) Vogelsang,H.; Edlinger, E.; Terler, E.; "Zöliakie - Erkrankung des Dünndarms mit hoher Dunkelziffer", in Arzt+Patient, Oktober 2009

What we do and who we are

The food intolerance network is a charity that provides worldwide information about lactose intolerance, fructose malabsorption, histamine intolerance, FODMAP-diet and much more. Usage of this website is free of charge. We are funded by the "Society for Public Health" and advertisements that have no influence on the editorial content of our website. Please read our terms of use before you use our services.

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On this website you can open a free account and interact with many others suffering from food intolerances. You can organize groups and events, can upload fotos, discuss, ask and answer others, you can add friends and much more. We are the leading community for people with food intolerances, food allergies or irritable bowel syndrome (IBS).

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The information provided on the Food Intolerance Network website is no substitute for a visit to a registered dietician, nutritionist or a doctor. The information that you will find here may not be used as a substitute for professional advice and treatment by a medical professional or approved and registered dieticians. The content of the Food Intolerance Network website may not be used as a basis or means for any form of self-diagnosis.

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