1, tofu+onion: calcium oxalate is formed, which makes it difficult to absorb calcium and leads to calcium deficiency in human body.

2, tofu milk+water bamboo: easy to form stones.

3, tofu milk+honey: easy to cause diarrhea.

4, tofu+spinach: oxalic acid in spinach and calcium in tofu form calcium oxalate, which makes the body's calcium unable to absorb.

5. Tofu+flounder: Increase the absorption rate of protein.