Safe. According to the doctor's website, seven thousand fruit and vegetable slices are a kind of compound dietary fiber supplement, which has the functions of relaxing bowels and lowering cholesterol. It is made of oat fiber, carrot fiber, plant fiber, pine valley soluble dietary fiber and other natural dietary fibers. It can promote intestinal peristalsis, soften stools, prevent constipation, colon cancer and rectal cancer, reduce the absorption of sugar in the intestine, lower postprandial blood sugar and lower blood pressure.