It is best to eat oranges at intervals of more than one hour after drinking milk. Milk contains a lot of protein, while oranges are rich in vitamin C and fruit acid. When protein is combined with fruit acid, it is easy to react in the intestine and produce solidified substances, which may induce indigestion, diarrhea, abdominal pain and other adverse reactions. If you want to eat milk and oranges at the same time, it is recommended to eat oranges after drinking milk for half an hour, so as to make full use of the nutritional value of protein in milk and vitamin C in oranges and avoid adverse reactions.