VITAMIN C THDA 20% ELIXIRThe Vitamin C THDA Elixir utilizes a 20% strength Vitamin C Tetrahexyldecyl Ascorbate (THDA) which is a lot more potent when compared to the average 15% strength inclusion of common Vitamin C ingredient, L Ascorbic Acid. Non irritating, oil soluble THDA is the superior form of Vitamin C, as it is more powerful, stable, and biocompatible than its water soluble, unstable counterpart. Apply directly to targeted areas or blend to boost other products. Use