What it is: A pure vitamin C antioxidant brightening serum with high performance for preventing early signs of aging.What it does: The serum helps fade scars, brighten skin and diminish fine lines and wrinkles.Research results:In a clinical trial on 20 subjects, over 4 weeks:- 16.26% improvement of pigmentation (visible melasma and blemishes)- 32.89% improvement of triple-complexion skin tone (red skin tone)- 32.36% improvement of triple-complexion skin tone (skin radiance)- 16.36% improvement of elasticity (internal elasticity)- 38.65% improvement of the pore (volume)- 27.18% improvement of the pore (count)- 4.18 % improvement of skin ageHow to use: Use the serum immediately and refrigerate after opening. After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side. Apply a few drops of the serum to skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face and working towards the edges. Keep the serum refrigerated. 0.67 oz.