2634
The controversy around antioxidant in vivo benefits has become intense in the past few decades and the present review tries to shed some light on research on antioxidants ( natural and synthetic ) and prooxidants , showing the potential benefits and adverse effects of these opposing events , as well as their mechanisms of action and detection methodologies .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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