“A product must be formulated carefully to enable sufficient delivery to the skin,” Howe explains. That’s because L-ascorbic acid (which comprises 15 percent of this serum) is water soluble, and in less precisely formulated serums, won’t effectively penetrate skin.
He says it has a light, non-greasy feel, while still delivering “the maximum amount of its active ingredients to the skin.” It is expensive, but worth the price due to its super-stable, patented formula, according to our experts. Kenneth Howe of the Wexler Dermatology Group. “I think it’s the best out there,” declares Dr.
Four of our dermatologists recommend Skinceuticals CE Ferulic, which they (and our editors) hail as the gold-standard vitamin C serum, and is suitable for all skin types.