The Glycolic Acid Rejuvenating Face Exfoliator gently exfoliates and retextures. It has been designed to help refine, brighten, and renew skin.. The Science. • Glycolic Acid aims to penetrate deep into the skin while treating fine lines, acne, blackheads, dullness, and oiliness for a youthful appearance.. • Proline contributes to the promotion of firmer, more illuminated skin and helps reduce the appearance of sagging skin, wrinkles, and fine lines.. Our 50ml formula is packed in a 60ml jar to allow the active ingredients to work at their best.