Review Of How Many Grams Of Vitamin C Are In An Orange Advice. Web citrus fruits (such as oranges and grapefruit) and their juices, as well as red and green pepper and kiwifruit, which have a lot of. Web the amount of vitamin c in an orange is 53.2 mg per 100g.as vitamin c percentage of the rda this is 89 %.

At the top of the list, according to the usda fooddata. Web citrus fruits (such as oranges and grapefruit) and their juices, as well as red and green pepper and kiwifruit, which have a lot of. Web one medium orange has 70 milligrams of vitamin c, or 78 percent of the daily requirement (55).