Celimax Retinal Shot Tightening Booster 15mlWhat is it: This advanced booster uses 0. 1% retinal (a stronger form of retinol) with A Shot technology to penetrate pores deeply. It targets wrinkles and enlarged pores effectively, helping your skin become smoother and firmer with regular use. The Vita A Retinal Shot Tightening Booster delivers powerful skincare in a tiny drop. This 15ml formula uses micro particles 16 times thinner than pores to target wrinkles, uneven texture, and enlarged pores.