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- Feb 12, 2005
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I know not to use Vitamin C with a copper product but what about with a glycolic acid serum (15%). I just bought a vitamin C serum and the directions stated one could use the 15% glycolic serum on top of the Vitamin C. But...now I'm wondering about all this business of oxygenation. I certainly don't want to be doing any damage to my skin and of course I don't want to be wasting my money on products that are canceling each other out or anything like that. Any advice is much appreciated!!