Cramps and bloating that develop after consuming protein powder are not normal. Most protein powders are made from soy or whey, a milk protein. If you have an allergy or intolerance to either of these foods, you could develop gastrointestinal symptoms from protein powders. Your doctor should evaluate your symptoms and overall health if you suspect protein powders cause cramps or bloating. Stop using protein powders until your doctor has checked you out.
Allergy
Food-related allergies commonly trigger bloating and stomach cramps within a few minutes of eating the food. Protein powders may contain allergenic ingredients, such as milk, or and eggs. Read the product label before using a protein powder supplement. If the product contains any allergenic ingredients, the U.S. government requires an allergy warning on the label. Cramping and bloating from a food allergy are the result of the release of histamine in the lining of the intestines, which causes inflammation and swelling.
Intolerance
Another common digestive condition that causes bloating and abdominal cramping is food intolerance. The Early Show explains that food intolerances are commonly confused with food allergies because of similar symptoms. Milk and soy are common foods that can trigger food intolerance symptoms. This condition differs from a food allergy because it's not an immune system reaction, but rather the inability of the digestive system to break down the protein in the protein powder. Food intolerance symptoms are the result of the proteins remaining undigested and entering the colon, which produces gas, bloating and diarrhea.
Digestive Conditions
Some digestive conditions, such as irritable bowel syndrome, Crohn's disease and lactose intolerance may lead to bloating and cramping. IBS is a chronic digestive condition that affects the colon and causes chronic diarrhea or constipation that may be triggered by milk products. Crohn's disease an inflammatory bowel disease that causes chronic inflammation in the digestive system. Whey protein powders contain lactose, which can result in cramping and bloating from the digestive systems inability to digest lactose, a sugar found in milk.
Fiber Consideration
Some protein powders contain fiber, which can cause temporary bloating and cramping. Suddenly increasing fiber can cause gas, bloating and stomach pain because the bacteria in your gut is not accustomed to the amount of fiber, notes MedlinePlus. If the bloating and cramping is from increasing fiber, the symptoms should subside with one to three days.
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