Can overdose of vitamin C cause kidney failure? Nausea, diarrhoea and kidney stone risks explained

While many believe high-dose Vitamin C is harmless, excessive intake can harm kidneys by converting to oxalate, potentially causing stones and failure. Early signs like nausea and diarrhoea signal overload. Individuals with existing kidney issues or dehydration face higher risks. Safe limits are crucial; consult a doctor for high doses.