This is a serum from the brand’s 611 line which combines 6 nutrient-rich base ingredients (Squalane, Sea Buckthorn, Papaya, Rice Bran, Calendula, Allantoin), 1 core ingredient (Niacinamide) and 1 effective technology (Niacinamide + Rice Bran). The serum is formulated with 5% Niacinamide to target dark spots and improve uneven skin tone, so it is recommended for those with these skin concerns: acne, oily skin, uneven texture and hyperpigmentation. It comes in a 50ml (1.69 fl.oz) tube with a pump.Apply the serum after cleansing or toner/essence and pat the face gently until it’s fully absorbed. A full pump should be enough product to use for the face. Sometimes products that come with pumps dispense a lot of product, but this one gets out just as much as needed. It’s also recommended to be used only on the problem areas, but I’d say it’s better to apply it all over to get its benefits on the whole surface of skin.