celimax The VITA-A Retinol Shot Tightening Serum 30ml. Features Pure vitamin A retinol, stabilized and upgraded from a retinol derivative, is an excellent high-performance ingredient of addressing wrinkles and pores caused by loss of skin elasticity. High-Performance care with 0.1% of pure retinol, not a retinol derivative Experience the delicately rising red glow of collagen by yourself. Actual amount of collagen production 137.34% The A-Shot™ ingredient, a fine particle that can cause a tingling sensation, contains 162,000 particles that delicately stimulate dull skin, leading to fundamental skin changes and a differentiated tightening effect.