An excellent brightening serum that contains AHA & Mushroom extracts, leaves skin with full-fairness and moisture, the O3+ Brighten Up Serum is a sure winner for star quality skin! This smooth, brightening serum effectively penetrates into skin, giving it a boost of radiance and brightness. A compound of brightening ingredients such as AHA, which contains a natural brightening substance, and Mushroom extract, which helps reducing dullness makes skin look bright and clear.