In the past few days, there has been a popular paragraph on the Internet: “There are more and more hyperkalemia in the emergency room. When asked about the medical history, many people use low sodium salt, because low sodium salt is more expensive than normal salt, and they think that the expensive is good. Nephrologists, every day, talk, just buy the cheapest snow salt, can not buy low sodium salt, low sodium salt is high potassium salt, is a life-saving salt, I am afraid that the general doctors also do not know, or also did not pay attention, only nephrologists pay special attention. I do think this to turn! It is indeed closely related. Supermarkets sell low sodium non-iodized salt, or don’t buy it, just buy ordinary non-iodized salt!” Many friends consulted me after seeing this segment, and even this segment caused some panic in a small circle. As a nephrologist, it is necessary for me to come out and clarify. Potassium is an essential electrolyte for the human body, and the blood potassium concentration is 3.5 to 5.5 mmol/L. The normal blood potassium concentration plays a very important role in maintaining cardiovascular function and other human functions. Potassium in the human body comes from food, and food contains the most milk, bananas, oranges and raisins. We all eat different foods every day, and the amount of food we eat varies from day to day. So how does the body keep its blood potassium concentration stable? This is because the body has a system of blood potassium regulation. Excess potassium in the body is excreted mainly through the kidneys as well as the intestines and sweat. In addition, excess potassium in the blood enters the cells with glucose under the action of insulin. Among these organs and functions, the most important is the kidney, which plays a key role in regulating the blood potassium concentration. If the intake of potassium is insufficient, the kidneys will reduce the excretion of potassium; if the intake is excessive, the kidneys will excrete the excess potassium. So I have not heard of eating oranges, eating bananas to eat too much high blood potassium. It can be said that as long as the kidney function is normal, high blood potassium almost never occurs. Hypertension is currently the main risk factor for heart disease and stroke, which in turn are the most important causes of death and disability worldwide. It can be said that hypertension is still the great enemy of human health at present, and the prevalence of hypertension among adults in China is as high as 30%, so controlling hypertension is a daunting task faced by the global medical community and national governments. Although there are many factors in the development of hypertension, excessive sodium intake and low potassium intake are undoubtedly important causes. On January 31, 2013, the World Health Organization published new guidelines recommending that adults should consume less than 2 grams of sodium per day, or less than 5 grams of salt, and at least 3.5 grams of potassium. The recently updated Canadian hypertension guidelines also recommend for the first time that dietary potassium intake be increased to lower blood pressure in patients without risk factors for hyperkalemia. The low sodium, high potassium salt currently promoted in China contains 26-30 grams of sodium per 100 grams of salt and 13 grams of potassium per 100 grams. If you don’t eat salt as a meal, even if you have a heavier taste, consuming salt with this content will not lead to hyperkalemia. Of course, not all people can safely consume high potassium salt. Patients with severe chronic renal failure are at risk of hyperkalemia when they consume low sodium and high potassium salt, in which case doctors will give dietary advice to patients. However, high potassium salt should not be denigrated or even rejected by the entire population just because chronic renal failure patients cannot consume high potassium salt. This is as absurd and ridiculous as calling for a universal boycott of grapes because it is best for diabetics not to eat grapes. This absurd paragraph is very unreliable and irresponsible, no matter if it is written by a doctor or someone pretending to be a doctor. Not only will it mislead people about their health, but it will also cause a certain amount of panic.