Starch is a sugar or a carbohydrate. Carbohydrates are converted in our bodies into glucose: our body’s energy supplier. Starch is a long chain of glucose molecules attached to each other, or a polymer. Several digestive enzymes are available to digest these long molecules. In particular, the enzymes Invertase and Gluco-Amylase help to digest starch. Intoleran has developed a product containing Invertase and Gluco-Amylase called Starchway.

CSID stands for Congenital Sucrase-Isomaltase Deficiency. This is a rare genetic disorder in which there is a lack of enzymes in the intestines to digest starch. As a result, these people have digestive problems from birth. Complaints such as abdominal pain and diarrhoea are frequent.

SID or Sucrase-Isomaltase Deficiency is the non-congenital variant of CSID. Here, too, there are problems digesting starch due to an enzyme deficiency in the intestines.

Due to an enzyme deficiency in the intestines, carbohydrates are not broken down into shorter glucose molecules and are therefore not absorbed into our bodies. Instead, they leave the body in the form of faeces via the stomach, small intestine and large intestine.

The annoying thing is that our body, in the case of an enzyme deficiency, cannot ‘cut the carbohydrate chains into pieces’. Because of this, the carbohydrates will not be absorbed into the body through the intestinal wall. They are transported to the colon and fermented there by our intestinal bacteria, releasing gases and acids in the process. These gases and acids can cause flatulence and diarrhoea.

our products

quatrase forte – 36 capsules


Capsules containing four different enzymes to aid the digestion of various FODMAPs such as lactose. Ideal for the consumption of large amounts of FODMAPs.


starchway – 50 capsules

starch and sucrose intolerance

Capsules containing the enzymes Invertase and Gluco-Amylase.


fructase – 36 capsules

fructose intolerance

Capsules with the enzyme Xylose Isomerase


fibractase forte – 36 capsules

fructan and galactan intolerance

Capsules containing the enzyme Alpha Galactosidase.


lactase 20,000 – 50 scored tablets

lactose intolerance

This product is the highest lactase dosage tablet we supply. It is ideal if you are very sensitive to lactose or when consuming large amounts of lactose from food.


free advice from our dietitians

Do you have questions about our products? Feel free to contact us. One of our dietitians will help you find the supplement that fits your needs best.

intoleran employees
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