Because microbes used as probiotics already exist naturally in your body, probiotic foods and supplements are generally considered safe. They may trigger allergic reactions, and may also cause mild stomach upset, diarrhea, or flatulence (passing gas) and bloating for the first few days after starting to take them.

What is the downside of taking probiotics?

Probiotics are safe for the majority of the population, but side effects can occur. The most common side effects are a temporary increase in gas, bloating, constipation and thirst. Some people can also react poorly to ingredients used in probiotic supplements or to naturally occurring amines in probiotic foods.

Is it OK to take a probiotic every day?

A common question about probiotics is whether it is ok to take probiotic supplements every day. Whilst there may be a few exceptions to this rule, the general answer is yes, it's safe, and usually recommended, to take them daily. It's important to understand that probiotics are a natural supplement and not a medicine.