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I have some l-lysine dated to 2004. What would be your take on that? Not canned but in a plastic bottle. It’s still in the original sealed caplets. And then there are all the other sealed vitamins e c a d b. If they were sealed in airtight bottles would they still be good. Obviously storing vitamins is a shortcut over storing real food in cans but one that could help a great deal if certain foods become unobtainable.