Both Ensure and Boost shakes may cause side effects, such as constipation, nausea, and flatulence. However, user reports indicate that most of them go away when consumed consistently. Other reported side effects include muscle cramps, irregular heartbeat, and shortness of breath.

Does Ensure help with constipation?

Try a nutritional supplement, such as Ensure^® Protein Max, which contains 3 g of scFOS fibre. ScFOS fibre has been shown to help maintain regular bowel movements. Stay well hydrated.

Can protein drinks make you constipated?

It goes without saying that an excess of anything does no good to our body. That's the same case when it come to protein shakes. When protein shakes are consumed as part of a healthy balanced diet, they don't cause either diarrhea or constipation.