REN Clean Skincare AHA Smart Renew Body Serum. REN Clean Skincare AHA Smart Renew Body Serum. Restore your skin's natural radiance with REN AHA Smart Renewal Body Serum. Targeting dullness and dryness, this resurfacing serum boosts the skin's natural exfoliation process, increasing cell renewal and evening out pigmentation. Skin is left looking plump and hydrated and feeling silky smooth to the touch.. Probiotics strengthen the skin's natural barriers to protect and lock in moisture. Xylitol boosts skin hydration while Lactic Acid smooths and refines skin texture. Suitable for all skin types. 6.8 fl oz. Gently massage into clean skin, all over your body until absorbed. RENR-WU47. 5060389246791. Clean Skincare, since 2000. At REN, 'Clean' is at the heart of all they do. They use ingredients that work with your skin, without causing irritation. Ingredients your skin would choose, from sustainable sources and sustainably packaged - because great skincare shouldn't cost the earth. Their skincare is created for all skin types (yes, even sensitive) with pH balanced formulas that won't upset your skin. REN packages their products with the planet in mind, using bottles made with Ocean Plastic, tubes made from post-consumer-recycled plastic and designed for circular recycling.