Peter Thomas Roth Potent-c Power Serum, 1-oz. in Bloomington, MN

Defy 7 signs of aging in 7 days. Potent-c Power Serum unleashes the strength of Thd ascorbate, an ultra-stable scientific breakthrough ingredient 50 times more powerful than traditional vitamin C. Packed with a jaw-dropping concentration of 20% vitamin C, the serum's efficacy is amplified by the addition of two ultra-powerful antioxidants (3% vitamin E and 2% ferulic acid), delivering a complete and advanced anti-aging, firming and brightening treatment. This fragrance-free, non-irritating, rich moisturizing serum is a must for improving fine lines, wrinkles, firmness, uneven skin tone, texture and brightness.