Kidney stones, or a history of kidney stones: Large amounts of vitamin C can increase the chance of getting kidney stones. Do not take vitamin C in amounts greater than those found in basic multivitamins.
出自:
http://www.webmd.com/vitamins-supplements/ingredientmono-1001-Vitamin%20C%20(VITAMIN%20C%20(ASCORBIC%20ACID)).aspx?activeIngredientId=1001&activeIngredientName=Vitamin%20C%20(VITAMIN%20C%20(ASCORBIC%20ACID))