A Guide to Identifying Sucrose Intolerance

A Guide to Identifying Sucrose Intolerance

A Guide to Identifying Sucrose Intolerance

No one knows your body better than you do. Paying attention to how you feel, along with the symptoms your body experiences, can be vital to ensure continued good health. For example, gastrointestinal symptoms like bloating, gas, stomach pain, and diarrhea can be a simple annoyance or severe enough to disrupt your daily life, especially if you have Sucrose Intolerance caused by Congenital Sucrase-Isomaltase Deficiency (CSID).

CSID is the inability of your body to properly digest sucrose (sugar) due to the absence or low levels of the intestinal enzymes sucrase and isomaltase. So, when does a simple gastrointestinal symptom become something more? Let’s take a look at some of the symptoms experienced by those of you with CSID.

A Guide to Identifying Sucrose Intolerance


Diarrhea is a condition that most people deal with on an occasional basis. It can be caused by an acute illness like the flu or rotavirus, but it can also be triggered by dietary choices. CSID is characterized by chronic diarrhea, bloating, gas, and abdominal pain after the ingestion of foods that contain sucrose. You should contact your doctor if your diarrhea is chronic, or if you have severe diarrhea that lasts more than a few days, or is accompanied by a fever.

Abdominal Pain

Perhaps you have a big deadline to meet or a speaking gig in front of hundreds of people. That simple stomachache you experience could be caused by stress and nerves and will disappear once the stress-causing situation is over. But abdominal pain can also be caused by a food that doesn’t agree with you.

For some of you, foods containing gluten can cause abdominal pain; for others, the sucrose found in breads, cereals, and certain fruits and vegetables can trigger abdominal pain due to CSID. But chronic stomach or abdominal pain could be a sign of something even more serious, especially if the pain lasts more than a week or gets more severe and frequent over time. If you are concerned about frequent abdominal pain that doesn’t get better, be sure to contact your physician.


Bloating can be a nuisance symptom or something that impacts your life on a daily basis. Bloating is a feeling of fullness, distention, or tightness of the abdomen. Although bothersome, bloating is usually nothing serious. Bloating can be caused by dietary choices, or by conditions like irritable bowel syndrome or Sucrose Intolerance caused by CSID. It is important to talk to your physician if you have bloating accompanied by other worrisome symptoms like chronic diarrhea or constipation, weight loss, or lack of appetite.

You are in charge of your body and you know it best. If you have been experiencing symptoms such as diarrhea, bloating, gas, or abdominal pain, take the Sucrose Intolerance quiz* and speak with your physician.

*This quiz is not a diagnostic.

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Sucrose Intolerance May Be More Common Than You Think