Illumin contains four different types of acid; TCA, AHA, BHA and PHA to instantly provide an instant brightening effect. Illumin uses Squalane and Bixa Orellana Seed to protect the formula from oxidation while also providing a moisturizing and protective layer to the skin during the procedure.  This oil film protects the skin.  Indications include skin rejuvenation, acne, scarring, blackheads, hyperpigmentation, and regulating sebum production. pH 1.9 - 3.2 35% TCA, 1% Salicylic, 1% Glycolic, 1% MandeliC, 1% Citric, .67% Lactic It is good for 7 days once opened, Comes with one vial 6ml