For about 1 hour before or after drinking milk, it is not advisable to eat oranges. This is because when the protein in milk encounters the citric acid in oranges, it will coagulate, thereby affecting the digestion and absorption of milk. During this period, it is also not suitable to consume other acidic fruits.
80% of the protein in milk is casein. When the pH of milk is below 4.6, a large amount of casein will coagulate and precipitate, making it difficult to digest and absorb. In severe cases, it may lead to indigestion or diarrhea. Therefore, acidic beverages such as fruit juice should not be added to milk.
The lysine in milk can react with fructose under heating conditions to form toxic fructoselysine, which is harmful to the human body. When boiling fresh milk, do not add sugar. It is not too late to add sugar after the milk has been boiled and has cooled slightly.
Milk is rich in protein and calcium, while chocolate contains oxalic acid. Consuming them together can form insoluble calcium oxalate, which greatly affects calcium absorption and may even lead to symptoms such as dry hair, diarrhea, and slow growth.
Because milk can easily form a coating on the surface of medication, causing the calcium and magnesium minerals in the milk to react chemically with the drug to form insoluble substances, thereby affecting the drug's efficacy.