Enzyme jellies will not darken the intestines and cause cancer in the long term. Enzyme jelly belongs to food, which is the product of fermentation of many kinds of plants and fruits, etc., and belongs to enzymes. Therefore, moderate use will not lead to intestinal blackening and cancer. However, because the market specification is not clear, the production of enzymes may add senna and other pharmaceutical ingredients, long-term use may still be a risk. May affect the digestive function, long-term use of enzyme jelly may cause intestinal dysfunction, people with weak stomach may have diarrhea and other conditions. May also cause malnutrition, because the enzyme jelly as a diet meal replacement consumption, will lead to intestinal flora imbalance, nutrient absorption disorders and so on.