Made with stabilized Vitamin C derivative Ethyl Ascorbic Acid that has 86% pure Vitamin C content. That is much higher than 40-50% content present in other Vitamin C derivatives. At a pH of ~4.0 it is highly stable and effective Contains 1% Acetyl Glucosamine (AG), an amino-monosaccharide (simple sugar) and a precursor of hyaluronic acid, that provides skin moisturization, boosts natural Hyaluronic Acid synthesis, and regulates natural exfoliation.