Since reports last month that a substance in red wine was found to prolong life in obese mice, sales of dietary supplements containing the stuff have spiked. Seems that people seeking immortality may find their fountain of life in the form of a bottle of cabernet — or rather, 700 bottles, since that’s how much you’d have to drink a day to get the amount of resveratrol, as the substance is called, that the researchers fed those mice.

Anyway, now it seems that unlike a good Bordeaux, these supplements don’t age well. Today the Wall Street Journal reported that one of the few things we know about this magic potion is that “resveratrol is prone to oxidation, or breaking down when exposed to air … [therefor] a capsule form may be preferable.”

That makes the pill bottle a great candidate for a screwcap closure, too, I guess.