A while ago I got teeth whitening gel from my dentist and didn't finish it all up. I was wondering if anyone knew if that sort of thing expired. And perhaps more importantly, if it ages in the 'now it's just not as powerful' way or the 'now you'll get sick if you use it' way. Thanks in advance!
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The best place to store it is in your refrigerator. As long it is in a cool dark place it is probably active for about 6 mos from that expiration date. If you have not.....it won't hurt you, most of the active ingredient (hydrogen peroxide derivitive) has probably dissapated and become inactive. It won't hurt you, it just won't help.
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