Drink before or during meals. Soymilk plays a slimming role in the process of digestion and absorption, so it is best to drink it at meals. If you want to use the satiety of soybean milk to prevent overeating, you can also drink it before meals. The best time to drink every day is from morning to evening when the muscle activity is high. It is easy to accumulate body fat when there is little activity at night, so try to avoid it.