1141
BACKGROUND : Vitamin C acts as a potent antioxidant ; however , it can also be a prooxidant and glycate protein under certain circumstances in vitro .
 Chemical: Vitamin C
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Vitamin C