Featuring CPTG Certi ed Pure Therapeutic Grade® essential oils of Frankincense, Hawaiian Sandalwood, and Myrrh in generous proportions, do–TERRA Tightening Serum is scienti cally formulated to reduce the appearance of  fine lines and wrinkles and promote skin hydration. Tightening Serum tightens and smooths skin with natural extracts and scientifically proven ingredients for firmer, younger-looking skin.