To start, we would note that prebiotics have been designated as Generally Recognized as Safe (GRAS) by the Food and Drug Administration. They are commonly found in everyday foods as we have written about in other articles. There’s nothing particularly extraordinary or unusual about prebiotics and, for the most part, they are all-natural.
Prebiotics side effects can come from overdoing intake as with any typical food source. Prebiotic venders typically suggest that high doses of prebiotics can lead to abdominal pain, bloating or flatulence if too many prebiotics are taken too fast. They recommend reducing to lighter doses if these side effects occur and building up slowly. If you are taking supplements, consult the product information for an idea as to how much you should be taking. If you are not sure, ask your health care professional.