Because potassium plays a key role in cancer prevention and treatment, besides reducing sodium intake, taking more food with potassium in the diet will greatly reduce the risk of cancer. Potassium is an important cation in human body, and the potassium content of bananas is particularly high. The potassium content in 100g bananas is about 330mg, which is about 100g fruits.
Sweet potato is rich in cassava starch and methylcellulose, so we should eat more. Under normal circumstances, it is best to maintain the intake of fruits and vegetables at 300 to 500 grams per day. In addition to potassium supplementation, these high-salt foods, such as pickled sausages, bacon, idle fish and their salty foods, must be eaten less or not.
History of potassium research
Potassium salts have been recognized for centuries in the form of saltpeter (potassium nitrate, KNO3), alum (potassium aluminum sulfate dodecahydrate, kal (SO4) 212h2o) and plant ash (potassium carbonate, K2CO3), which are used in the manufacture of gunpowder, fuel and soap. Reducing potassium-containing substances to elements frustrated early chemists, and potassium was classified as soil by Antoine Lavoisier.
Because of the strong activity of potassium, it is difficult to reduce metal potassium from potassium compounds with commonly used reducing agents (such as carbon). Later, in 1807, molten potassium hydroxide was electrolyzed in humphry davy, and it was found that metal pellets were formed, which was potassium.