Carbohydrate Malabsorption
Carbohydrate Malabsorption is a condition where your body has difficulty fully digesting and absorbing certain carbohydrates (sugars and starches) in your small intestine. Instead of being broken down and absorbed for energy, these undigested carbohydrates pass into your large intestine (colon). Here, naturally present bacteria ferment them, leading to a range of uncomfortable digestive symptoms. This malabsorption can occur for several reasons. Often, it's due to a deficiency in specific enzymes, like lactase, which is needed to break down lactose (milk sugar). Other causes can include damage to the small intestine lining from conditions like celiac disease or inflammatory bowel disease, certain infections, or even rapid movement of food through your digestive tract. Sometimes, the pancreas might not be producing enough digestive enzymes. If you're experiencing symptoms consistent with carbohydrate malabsorption, your doctor will likely order specific lab tests. These tests are crucial to accurately diagnose the condition, identify which specific carbohydrates might be causing the problem (such as lactose, fructose, or sucrose), and rule out other potential causes for your symptoms. Identifying the exact carbohydrate helps your healthcare team recommend targeted dietary adjustments and treatments to help you feel better.
Common Symptoms
- Bloating
- Abdominal pain or cramping
- Diarrhea (often watery)
- Excessive gas (flatulence)
- Nausea
Clinical Sources
- Malabsorption (Syndrome): Symptoms, Causes & TreatmentCleveland Clinic
- Hydrogen Breath Test: What Is It, How To Prep & ResultsCleveland Clinic
Diagnostic Lab Tests
Tests commonly used to diagnose or monitor Carbohydrate Malabsorption:
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