1, spinach can't be eaten with cucumber: cucumber contains vitamin C-decomposing enzymes, while spinach is rich in vitamin C, so they should not be eaten together.

2. Spinach should not be eaten with foods with high calcium content such as milk.

3, spinach can not be eaten with tofu: because spinach contains a lot of oxalic acid, while tofu contains calcium ions. Once spinach and calcium in tofu are combined, it will cause stones and affect the absorption of calcium.

Extended data:

Precautions:

Spinach contains oxalic acid. If it is eaten directly, it will affect the absorption of calcium, so it is best to use hot water before eating. This purpose is to destroy the oxalic acid in spinach and prevent the formation of calcium oxalate that is difficult for the human body to absorb.

Spinach that has not been eaten overnight is because the spinach that has been eaten overnight contains nitrate and nitrite under the action of reductase, which is harmful to human body, especially when the weather is hot, and it is not just spinach.

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