(1) phase grams of phosphorus and calcium: For example, it is not appropriate to eat milk and lean meat together, because milk contains a lot of calcium, while lean meat contains phosphorus, and these two nutrients cannot be absorbed at the same time.

(2) Oxalic acid and calcium phase grams: Tofu should not be eaten with spinach, because spinach contains more oxalic acid, which is easy to combine with calcium in tofu to form insoluble calcium salt, which cannot be absorbed by human body. Seaweed and Nostoc flagelliforme, which are rich in calcium, should not be eaten together with amaranth and thick-skinned vegetables, because the latter contains more oxalic acid, and the absorption rate of calcium is greatly reduced when they are mixed.

(3) Cellulose and zinc phase grams: marine mollusks such as oysters are very rich in zinc, and should not be eaten with broad beans, corn products or brown bread, because the latter is a high-fiber food, and eating them together can reduce the absorption of zinc by 65% ~100%.

(4) Cellulose, oxalic acid and iron phase grams: animal livers, egg yolks and soybeans are rich in iron, and they can't be eaten together with celery, radish and sweet potato with more cellulose, nor should they be eaten together with water spinach, amaranth and spinach with more oxalic acid. Because both cellulose and oxalic acid will affect the absorption of iron in the above foods.