Peter Thomas Roth
Potent-C™ Power Serum
Packed with 20% vitamin C, the serum’s efficacy is amplified by the addition of powerful antioxidants: 3% vitamin E and 2% ferulic acid.
Sephora and Sephora.com.
Contains THD ascorbate, an ultra-stable breakthrough ingredient that is 50 times more powerful than traditional vitamin C.