Eat fruit to lose weight and abdomen 1, pineapple to abdomen to lose weight Have you ever heard people say that pineapple is "beneficial" and must be eaten after meals so as not to hurt your stomach? There is evidence for this statement! Because the proteolytic enzyme of pineapple is quite powerful, it can help protein digestion of meat, but if you eat it before meals, it is easy to cause stomach wall damage! Therefore, we must pay attention to the time problem when eating pineapple to lose weight.