Best Diet for Stomach

What is the best diet plan for stomach. Although there are many diet plan company promise that their diet plan is safety, but I distrust them.

What’s best diet plan for stomach? I think eat fruit, vegetable and oatmeal are good for your stomach, also those foods can help you diet. Because fruit, vegetable and oatmeal are rich fiber foods. They not only can protect your stomach, but also prevent overfeeding. So if the diet plan contain these great foods, I think the diet plan is perfect; If not, the diet plan suck.