DCL scientists have developed a breakthrough product with more than double the concentration of stable, non-irritating "C". This new High Potency "C" Serum 25 has the same look and feel of the original formula, and DCL believes it contains the strongest concentration of Vitamin C available to physicians. The benefits include: more than double the concentration of stable, non-irritating "C" - Ascorbyl Methyl Silanol, Non-irritating - no need to step up, facilitating the skin's production of appearance-enhancing collagen, improving the skin's firmness and texture, and it's an anti-radical scavenger.