StriVectin Super-C Retinol Serum is a breakthrough anti-aging face serum that combines stabilized Vitamin C and Retinol in a single non-tacky, fast-absorbing formula — a first in its category, busting the longstanding myth that Retinol and Vitamin C cannot safely be used together. This Costco set includes one full-size 1.0 fl oz bottle and one bonus 0.5 fl oz bottle, totaling 1.5 fl oz of product, suitable for all skin types.

The serum is clinically proven to restore radiance and clarity to dull, tired skin, smooth fine lines and uneven texture, and visibly firm and improve elasticity. Key active ingredients include stabilized Vitamin C (Sodium Ascorbyl Phosphate and Ascorbic Acid), Acerola Cherry extract as a concentrated natural Vitamin C source, Retinol for deep wrinkle correction and firmness, Sodium Hyaluronate for hydration, and Myristyl Nicotinate — StriVectin's exclusive barrier-strengthening form of Niacin. Additional botanicals include Apple Stem Cell extract (Malus Domestica), Green Tea extract (Camellia Sinensis), and Tamarind Seed Polysaccharide. In a clinical study of 35 subjects, 97% showed improvement in skin brightness at 6 weeks, and 100% showed measurable improvement in skin firmness.

To use, shake well before each application, then apply 1 to 3 drops to the face, neck, décolleté, or back of hands in the morning and evening, followed by a moisturizer. During daytime use, follow with SPF protection. Pairs well with StriVectin Super-C Eye Vitamin Cream or Super-C Night Vitamin C Cream.

Full ingredients: Aqua (Water, Eau), Sodium Ascorbyl Phosphate, Glycereth-7 Triacetate, Pentylene Glycol, Polysorbate 20, Dipropylene Glycol, Glycerin, Dimethyl Isosorbide, Ascorbyl Glucoside, Ascorbic Acid, Malpighia Glabra (Acerola) Fruit Juice, Retinol, Sodium Hyaluronate, Myristyl Nicotinate, Tamarindus Indica Seed Polysaccharide, Orobanche Rapum Extract, Malus Domestica Fruit Cell Culture Extract, Camellia Sinensis Leaf Extract, Xylitylglucoside, Bacillus/Sea Salt Ferment Filtrate, Hydroxymethoxyphenyl Decanone, Anhydroxylitol, Adenosine, Xylitol, Glucose, Ethylhexylglycerin, Lecithin, Xanthan Gum, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Propanediol, Maltodextrin, Rhizobian Gum, Mica, Parfum (Fragrance), Limonene, Linalool, Geraniol, Citral, Citronellol, Benzyl Benzoate, Chlorphenesin, Phenoxyethanol, BHT, BHA, Sodium Benzoate, Potassium Sorbate, CI 77491 (Iron Oxides), CI 77891 (Titanium Dioxide).