Vitamin E is not a preservative.

Do her products contain water soluble ingredients?

ETA: Looks like her products are anhydrous. Not sure why she was using optiphen to begin with--unless her products are designed to be used on damp skin/hair, then that would make sense because people might introduce moisture into them.

Last edited by coilynapp; 01-24-2013 at 04:04 PM.