powerbars should be edible well past the expiration date. As long as the packaging is intact then there is no way stuff could ever grow win a powerbar even if you left them for a 100 years as they will be sterile packed when they are made.
The only problem is that the bar may begin to taste stale as the ingredients in the bar break down or change their physical properties, e.g crystallise out, or otherwise interreact. I would say as long as the bar tastes OK then I would be happy to eat it.
Edit: putting them in the freezer would probably be a good idea and would extend the shelf life
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only the dead have seen the end of mass motorized stupidity
Plato
(well if he was alive today he would have written it)
Last edited by royalflash; 01-30-05 at 02:55 PM.