Peter Thomas Roth Even Smoother Glycolic Retinol Resurfacing Serum

What it is: A nightly resurfacing serum with a high-potency 15% glycolic acid complex. What it does: This serum also contains 1.5% time-released microencapsulated retinol to help visibly improve the look of skin's texture, clarity and tone, along with fine lines and wrinkles. Allantoin and adenosine help soothe skin's appearance. Niacinamide, hyaluronic acid and collagen leave skin appearing healthy, plump and glowing. Research results: In a four-week consumer perception study on 34 women from ages 37–55: - 100% agreed skin did not feel tight or dry  - 97% agreed the look of skin's texture was improved - 97% agreed skin had improved clarity - 94% agreed skin looked renewed and less dull - 91% agreed skin appeared more even-toned How to use: Apply nightly. Use SPF protection during the day. If mild irritation or redness occur, use every other night until skin adjusts. Gradually build to nightly use. 1 oz. Paraben-free; sulfate-free; phthalate-free; fragrance-free; silicone-fr