This helps prevent oxidation, which happens when it is ... It has been the gold-standard vitamin-C serum for years, so much so that lots of formulas (some of which are on this list) have mimicked ...

As a bonus, this serum comes in an opaque, pump bottle to help reduce oxidation and maintain the formula’s effectiveness. 107 Beauty Soseo Vinbiome Vitamin C Serum 107 Beauty Soseo Vinbiome ...

“Choose serums in opaque, airtight containers to prevent oxidation,” advises Dr. Gohara. Is L-ascorbic acid the best vitamin C serum? L-ascorbic acid is the purest and most potent form of vitamin ...