ddecd425____Norris_Cotton_Cancer_Center_Water_soluble_vitamins_Function
[Nutrient] Ascorbic acid (vitamin C) [Sources] Found only in fruits and vegetables, especially citrus fruits, vegetables in the cabbage family, cantaloupe, strawberries, peppers, tomatoes, potatoes, lettuce, papayas, mangoes, kiwifruit [Function] 
Antioxidant ; part of an enzyme needed for protein metabolism; important for immune system health; aids in iron absorption
Vitamins: Their Functions and Sources | Health Encyclopedia | Norris Cotton Cancer Center
Function