The REN Glycol Lactic Radiance Renewal Mask featured in this post was provided for editorial consideration. Affiliate links that benefit this site are included. The REN Glycol Lactic Radiance Renewal Mask is free from parabens, sulfates, mineral oil, petrolatum, synthetic fragrances and colors, silicone and other toxins. It’s designed to improve skin tone and reduce fine lines with a combination of four natural AHAs (Alpha Hydroxy Acids) to deeply exfoliate and resurface your skin. Ingredients include glycolic acid from pineapple, lactic acid from passion fruit, citric acid from lemon, and tartaric acid from grape.