The serum contains these key ingredients 
Vitamin C Serum for Face
Vitamin C derivative (3-O-Ethyl Ascorbic Acid): Helps brighten dull skin and improve the appearance of dark spots.
Niacinamide (2%): Helps even skin tone and support the skin barrier.
Salicylic acid (0.5%): Helps exfoliate and unclog pores.
Glycerin: Helps hydrate the skin.
Sodium hyaluronate: Helps retain moisture.
Vitamin E derivative: Provides antioxidant support.