What it is: A serum that unleashes the strength of THD ascorbate, an ultra-stable scientific breakthrough ingredient 50 times more powerful than vitamin C.What it does: Packed a with jaw-dropping concentration of 20% vitamin C, this serum's efficacy is amplified by the addition of two ultra-powerful ingredients-3% vitamin E and 2% ferulic acid-delivering complete and advanced anti-aging, firming and brightening benefits. This rich, moisturizing serum is a must to help improve the look of fine lines, wrinkles, firmness, uneven skin tone, texture and breakage. How to use: Apply to clean, dry skin. For best results, use twice daily on the face and neck. 1 oz. Paraben-free; sulfate-free; alcohol-free; fragrance-free; gluten-free Made in the USA