Excessive vitamin C may lead to kidney failure

　    A 69-year-old man in Hong Kong took vitamin C to relieve periodic runny nose. The recommended daily dosage on the product packaging was 0.5 grams, but the patient took 4 grams of vitamin C every day according to the dosage in the nutritional book "The Best Nutritional Doctor with Vitamin C". After taking this amount for nearly two years, I unfortunately developed kidney failure.

　　“Excessive amounts of anything will be harmful to the body, let alone Vitamin C. ”Experts said that generally after an overdose of vitamin C, the excess VC in the body will be excreted in the urine, but before that it will first change in the kidneys and then be excreted. If the dose is too large, it will inevitably lead to damage to kidney function.

　　The author consulted a vitamin C instruction manual, and in the drug overdose column it stated that “taking 1-4g daily can cause diarrhea , rash, increased gastric acidity, gastric reflux, sometimes urinary stones, increased urinary excretion of oxalate and urate..." Experts say that high urate is an important indicator for the diagnosis of kidney disease, which also shows that excessive intake of vitamin C can lead to kidney disease.

　　In fact, there has always been debate about the dosage of vitamin C. The famous American scholar Linus Pauling pointed out that for most adults, the optimal intake of vitamin C is in the range of 2.3 grams to 10 grams based on his many years of research. He personally takes 18 grams of vitamin C every day.

　　Perhaps because of this controversy, many people think that eating too much vitamin C is not a big deal. In fact, as long as the diet is balanced, daily meals can meet the body's demand for vitamin C. If it is for the purpose of treating a disease, the patient must take it under the guidance of a doctor and the dosage cannot be modified without authorization.