The Celimax The Vita A Retinal Shot Tightening Booster is the "professional" version of the Celimax Vitamin A line. It contains 0.1% Retinal, which is significantly more powerful than 0.1% Retinol because Retinal converts to active Retinoic Acid up to 11 times faster. This booster is specifically designed for "pore tightening"—not just by cleaning them, but by dr