First of all, blueberries are cold, so most people will not get angry if they eat more blueberries.

Second, blueberries are cool, so if the stomach is bad, especially those with stomach cold and body cold, eat as little as possible, and people with hyperacidity are not suitable for eating too many blueberries. Fresh blueberries have a slight diarrhea effect, so don't eat them when diarrhea is not cured. Blueberries contain oxalate, so patients with kidney or gallbladder diseases, especially kidney calculi's disease and incurable gallstones should avoid taking too many blueberries, which will be harmful to their health. Besides, most people can eat more blueberries.

I hope my suggestion can help you, and hope to adopt it!