what vitamins do white onions have
Red Onions vs White Onions, Which Oneâs Healthier? Whatâs the Difference Red Onions vs White Onions. There are quite a few commonalities between both red and white onions. Both types of onions are considered low on the glycemic index, with a rating of 10. They both also provide about 10 percent of the daily value for vitamin C and the same amount of calcium per serving.