If you don't eat anything but drink fruit and vegetable juice, it will actually make your stomach in a relatively relaxed environment, or it will weaken because you don't need his efforts. At this time, if you eat too much, you will have a stomachache and diarrhea.
If you are moderate and eat less than usual, but still within the normal appetite range, then this will not happen generally. If you encounter it, see if the food you eat is hygienic, too cold and too exciting. If not, I suggest going to the hospital to see if there is any problem.
Proper diet will make the stomach and intestines in a healthier environment. At this time, many problems caused by bad habits are more easily exposed.
Just like fasting, it takes a process to eat less. If you decide to drink only fruit and vegetable juice one day, you should not overeat the day before and the day after, and even eat reasonably and without stimulation the day after.
Moreover, dieting will seriously destroy intestinal bacteria, and you can make some handmade yogurt to restore the work of intestinal bacteria.