Saponins contained in red bean skin are not only rich in potassium, but also have a strong diuretic effect, which can improve the edema of face and feet caused by beriberi and decreased renal function.

Step 2: potatoes

Because of its rich nutrition, potatoes are also called "apples growing in the soil". They are rich in inorganic salts, and the potassium content in inorganic salts is very high. Potassium can not only help the body to excrete sodium that is retained in the body due to excessive salt, but also promote the body to excrete excess water. In order to make effective use of potassium in potatoes, it is best not to peel potatoes when steaming, baking and boiling them.

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