specialist in digestive health since 2008

specialist in digestive health since 2008

We have been developing and producing nutritional supplements since 2008. Our products are specially developed with great care and attention by our in-house dieticians. For the composition of our products we use only necessary ingredients, so our products are pure, free of gluten and soy and of high quality. This ensures that our supplements can be used safely and without adverse side effects. Our products are low FODMAP Certified™ by Monash University.

free dietary advice

free dietary advice

Our team of specialized dietitians is always at your service with practical advice and additional information about our products. Contact us via:

Chat: for quick and direct personal advice

Mail: info@intoleran.com

Phone: +31302272172

more than 100,000 satisfied customers

more than 100,000 satisfied customers

Since 2008, our mission is to help everyone enjoy their food. We are proud to support over 100,000 customers already.

chronic diarrhoea

We all have diarrhea from time to time and this can be very annoying. But what if it lasts longer? Below you can read more about the chronic form of diarrhea and what you can do about it.

Diarrhoea is a thin, watery stool. There are two different forms of diarrhoea: acute and chronic. Acute diarrhoea occurs suddenly and goes away on its own within a few days. Chronic diarrhoea usually lasts longer than three weeks. Diarrhoea symptoms include a watery stool and holding a stool is difficult or impossible. Often, watery stools have a different colour and smell to normal stools. Additional symptoms include:

  • nausea
  • vomiting
  • fever
  • abdominal pain
  • abdominal cramps

If symptoms become serious; for example if you have a high fever or severe abdominal pain, always consult a doctor.

Traveller’s diarrhoea is a special type of diarrhoea, caused by poor hygiene. As the name suggests, this type of diarrhoea can be common on holidays when standards of hygiene may not be as good. To prevent traveller’s diarrhoea, it is important to check whether or not you can drink the tap water in the country you are visiting. For more tips on how to prevent traveller’s diarrhoea, contact your country’s main health organization.

Chronic diarrhea can have many different causes. The most common are listed below:

  • Irritable bowel syndrome (IBS)
  • Food intolerance
  • Overflow diarrhea (diarrhea caused by constipation)
  • Chronic inflammation of the bowel, in cases such as Crohn’s disease or ulcerative colitis
  • Chronic disorders of the pancreas, liver, and bile ducts
  • Inconsistent eating patterns
  • Medication.
  • Stress.
  • Accelerated metabolism.
  • After gastrointestinal tract surgery

If diarrhea persists for a longer period of time, the family doctor may recommend that the stool be examined. After this additional examination, the diagnosis of ‘chronic diarrhea’ can be made.

The treatment of chronic diarrhea depends on the cause. When the underlying cause is treated, the diarrhea symptoms will decrease. Only in some exceptional cases will long-term diarrhea inhibitors be prescribed.

There are a number of solutions to help with diarrhea:

  • Drink enough. Drink at least 2-3 litres a day. With diarrhea you lose a lot of fluids, so all the fluids that are lost need to be replenished.
  • Try to keep eating normally and preferably choose fiber-rich products such as whole grain foods, fruits, and vegetables. Fibre draws moisture from the stool, making the stool thicker.

The cause of chronic diarrhea should be established to determine the most appropriate dietary solutions. For example, if you suffer from irritable bowel syndrome (IBS) or a food intolerance, an appropriate dietary solution should be explored.

If you still suffer from diarrhea after adjusting your diet by drinking enough fluids and eating enough fiber it is advisable to contact a doctor or a dietitian.

If chronic diarrhea is caused by a food intolerance and you know which food components you are intolerant to, you can take supplements containing digestive enzymes. These will help you to properly digest the components in food to which you are intolerant. For most intolerances, there are supplements on the market. The supplements come in different types, sizes, and doses. There are also combination supplements containing several enzymes that you can use if you suffer from different intolerances.

dietitian intoleran

free advice from our dietitians

Let us help you with your digestive complaints, like we’ve helped many others. We will help you find the solution that fits your needs best.

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our products

lactase 20,000

50 scored tablets
  • Highest dosed lactase tablet
  • Ideal for large quantities of lactose
  • Pure composition and vegan ingredients

quatrase 10,000 (forte)

36 capsules
  • Special blend of digestive enzymes
  • Helps digest complex carbohydrates
  • Reduces the risk of gas formation*
  • Pure composition and vegan ingredients


50 capsules
  • Special blend of digestive enzymes
  • Pure composition and vegan ingredients
  • Low FODMAP Certified™ by Monash University


36 capsules
  • Contains the digestive enzyme xylose isomerase
  • Pure composition and vegan ingredients
  • Low FODMAP Certified™ by Monash University

DAO Plus

50 capsules
  • Contains the enzyme diamine oxidase (DAO)
  • Supplemented with vitamin C and quercetin
  • Suitable for children 4 years and older

fibractase forte (1200)

36 capsules
  • Helps digest complex carbohydrates
  • Reduces the risk of gas formation*
  • Pure composition and vegan ingredients
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