Do i have to take antioxidants 30 minutes before a meal?

Antioxidants: Antioxidants (Vit A,C,E etc) are something we turn to when we think of eating a healthy diet. However, the USPST recommends against using antioxidants Beta Carotene and Vitamin E to prevent cancer or cardiovascular disease. Studies show we have yet to find evidence that antioxidants can prevent cancer or disease. http://www.hsph.harvard.edu/nutritionsource/antioxidants/ http://tinyurl.com/hl5gv29