When first using probiotics, some people experience gas, bloating, or diarrhea. Changes in the gut microbiota can result in bacteria producing more gas than usual, which can lead to bloating. However, these side effects usually clear up within a few days or weeks of taking the probiotics.

Can probiotics initially give you diarrhea?

However, some patients take probiotics and feel even worse. Symptoms can include cramping, gassiness, diarrhea, fatigue, and even brain fog or memory problems. Often these symptoms intensify just after a meal.

Can too much probiotics cause diarrhea?

Taking excess probiotics can cause mild discomfort

If the bacteria get to the food before us, they can turn it into gas," says Farhadi. On top of excess gas, you might experience bloating or a generally upset stomach. Diarrhea can also occur, but that's about as bad as it gets.