Go to a health store and buy a bottle of a good brand of Vitamin C, get them in capsule form because the dissolve better than tablets. Purchase a complex with bioflavanoids. You would do yourself a...
citrus fruits
Yes. A very good source. Eating 1/2 cup of raw broccoli supplies 60 percent of the RDA of vitamin C.
Yes.
Oranges , lemons , limes ,