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Can Eating Too Much Protein Make You Feel Nauseated?

by
author image Jan Annigan
A writer since 1985, Jan Annigan is published in "Plant Physiology," "Proceedings of the National Academy of Sciences," "Journal of Biological Chemistry" and on various websites. She holds a sports medicine and human performance certificate from the University of Washington, as well as a Bachelor of Science in animal sciences from Purdue University.
Can Eating Too Much Protein Make You Feel Nauseated?
Too much protein at once can make you feel nauseated. Photo Credit Goja1/iStock/Getty Images

Whether you consume too much protein because of an extra-large meal, an excess volume of a protein-dense supplement or a protein-rich food to which you have an adverse reaction, a high protein intake can make you feel nauseated. The cause of your digestive distress depends on the circumstance of your protein consumption, and prevention of future problems depends on why the excess protein made you feel sick. Consult a dietitian or your health care provider if consuming protein causes nausea or other digestive issues.

Food Allergy

Specific food proteins can cause your immune system to mount an inflammatory response to what it perceives as a foreign substance in your digestive tract. For example, if you are allergic to the protein in wheat, consuming too much of it can cause a variety of allergic symptoms, including nausea. If you are severely allergic, even a small intake of the protein can elicit allergy symptoms. Most food allergies are mild, according to the University of Maryland Medical Center, but some can be severe enough to be life threatening.

Food Intolerance

Food intolerance is a digestive disorder rather than an immune disorder. In food intolerance, you lack a specific component of your digestive system that allows you to fully digest a certain food. For example, in lactose intolerance, your body does not synthesize sufficient lactase to digest the milk sugar lactose. Therefore, the undigested lactose moving through your intestinal tract can cause digestive distress with symptoms such as nausea. Even though the food you are intolerant of might not be a protein, it might be another food component associated with a food protein, such as lactose with milk.

Indigestion

Simply eating too much of a protein-rich food can make you nauseated due to indigestion. When you consume protein, digestive enzymes in your stomach and small intestine break down the large protein molecules into individual amino acids that you can then absorb. A sudden influx of protein, however, can overwhelm the ability of your digestive enzymes to match the pace with which you take in these food proteins. Until your digestive system catches up, you may experience nausea and other symptoms of digestive upset.

Considerations

In the case of food allergy, avoiding the offending protein eliminates the likelihood of feeling nauseous. For food intolerance, you may not necessarily need to avoid the protein associated with the food component you cannot tolerate. If you want to continue to consume that protein, you may need to eliminate the intolerable component from the protein. For example, drinking lactose-reduced milk allows you to consume milk protein while avoiding lactose. If you feel nauseous because you ate too much or too fast, moderating your protein intake can help you avoid feeling sick in the future.

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