10% Glycolic Serum combines powerful ingredients that exfoliate the skin and improve the appearance of skin tone and texture. This serum is recommended for skin prone to noninflamed acne. It is also recommended for skin that needs a boost up from 5% Glycolic Serum. This serum is appropriate for normal and oily types. Recommended for skin prone to moderate or severe noninflamed acne. Contains Senestem™ which helps improve the appearance of skin firmness, elasticity and smoothness. It also helps reduce hyperpigmentation and increase skin brightness. Glycolic acid has the smallest molecular weight of all the alpha hydroxy acids and penetrates the pore more quickly than other acids.