Loretta Dr. Loretta Anti-Aging Repair Serum $110.00 at Dermstore This formula has tetrahexyldecyl ascorbate, a powerful but less irritating form of vitamin C, which penetrates more deeply into ...

But vitamin ... C derivatives is similar to retinols and retinoids: Both work, but one is more concentrated and thus more effective. One of the most popular derivatives is tetrahexyldecyl ...

We don’t have to suffer through redness, irritation, and sensitivity just to use topical vitamin C. Turns out ... while being gentler. Meet tetrahexyldecyl ascorbate (aka THDA or THDC) who ...