The calorie of 100 ml of soybean milk is 35 calories, and that of 100 ml of yogurt is 70 calories. In fact, they are almost the same. Yogurt helps defecation and can speed up weight loss. You can take turns to eat them. Also, it should be noted that these two things can't be eaten on an empty stomach, so you must add something else. You can eat a piece of whole wheat bread, which is very low in calories!