If you thought anti-oxidants is a recent discovery then you are wrong by about 50 years. In fact, the antioxidant theory of aging was first proposed by Denham Harman in 1956. It is only recently that the marketing people have caught up.
But wait. Before you jump onto the bandwagon have a look at what Scientific American May 2009 issue has to say about it:
Companies have started putting antioxidants in goods as different as face cream and soda, claiming that they clean cells, prevent cancer and even stave off death. ...
Synthetic antioxidants have failed to show any clear longevity benefits to humans, and that has been a problem for Harman ever since he conceived the theory. Although anti-oxidants definitely prevent damage, there is no consensus on how much they forestall aging.
Who wants to live for ever anyway? Age in a dignified manner and die, I say.