It is said that drinking milk on an empty stomach will cause diarrhea, but I used to have superficial gastritis. I drink milk on an empty stomach, not only in the morning, but also when I am thirsty. Milk will form a mucous membrane on the stomach wall, which can protect the stomach wall from the stimulation of gastric acid and food. I recommended it to some friends, and everyone said it was effective, much better than taking medicine! As for absorption and nutrition, I'm not sure! Hee hee!