Red beans and mung beans cooked together is generally not harmful. Red beans and mung beans are legumes, the seeds of the red and green bean trees, both are a common food in life, in terms of diet, red beans contain protein, saturated fatty acids, sugars, fats, vitamin B1, vitamin A, vitamin B2, niacin, insoluble dietary fiber, vitamin E, and calcium, iron, phosphorus, potassium and other minerals. Mung beans contain protein, fat, carotene, folic acid, vitamin B1, vitamin B2, and calcium, iron, phosphorus, potassium and other minerals, neither belongs to the other’s contraindicated food, so cooking together does not appear to be harmful. However, the consumption of red beans and green beans need to pay attention to the right amount, so as to avoid bloating and other uncomfortable symptoms.