An adequate intake of vitamin C

may help protect against cancer and possibly other diseases. Besides oranges, thebest sources of vitamin C are, in alphabetical order, asparagus, blackberries, broccoli,cabbage, cantaloupe, cauliflower, grapefruit, kale, kiwifruit, mangoes, mustard

greens, peppers, raspberries, strawberries, tangerines, and tomatoes.

The vegetables ideally should be lightly steamed or eaten raw.  The fruits should be eaten as the whole fruit and not as a juice.  A glass of juice doesn't have all the fiber and other nutrients in it like the whole fruit does.

Vitamin C is not stored in our bodies and needs to be replaced daily.  Ideally we should have 500-1000mg a day for our immune system.  It also acts an antioxidant and anti-inflammatory.  The RDA for Vitamin C is only 60mg.  If you were to get 59mg a day you would get scurrvy.  The RDA keeps us just above deficiency levels.