Are you asking about the side effects of blueberry puree? The side effect of blueberry puree is diarrhea. Because blueberry puree is a cool fruit, it has a certain laxative effect. If you eat too much at once, a lot of cold food will enter the body, which will aggravate the coldness in the body, especially for people with hyperacidity, which is easy to cause diarrhea. So the side effect of blueberry puree is diarrhea.