The time period from 6 am to 7 am is the best time to drink soybean milk. After a night's biological clock cycle, the human body is very short of water and nutrition. Drinking soybean milk can supplement water and provide nutrition, and the absorption of soybean milk is the best at this time. Moreover, drinking soybean milk is also conducive to promoting the digestion and absorption of nutrients and awakening the digestive system in the morning. Therefore, the time period from 6 am to 7 am is the best time to drink soybean milk.