How long is this stuff viable? I found a bottle of Shisedo hyralonic acid -- not opened but it was on the bottom of my hoard so it must be old5+ years. Would you throw it out? use it on your hands?
Boy, I don't know. I hate to use old stuff - you don't know if it's going to cause free radical damage and that is even more expensive to correct than throwing out old stuff, if you follow my logic...
But Shiseido has a pretty high amount of preservatives in it, doesn't it? Check the label. Also, if it smells bad or is an off color or consistency, toss it. This is probably what you've already thought of, but just reinforcing your good sense!
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