BEST Vitamin C Serum
Medik-8C-TETRA ADVANCED
Medik8’s C-Tetra Advanced Serum outperforms the competition with its mix of 20-percent THD (a highly stable form of vitamin C) and phyto exosomes that help soothe and support the skin barrier.
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$76
“Not all vitamin C serums are created equal. This one uses 20 percent THD, a stable, less-irritating form, so you get brightness without the sting. My complexion looked clearer and more luminous shortly after starting it." —Marisa Petrarca, features editor
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