Comparison of Vitamin C in the Tester Kit vs. AA2G™

The Vitamin C E Ferulic tester kit primarily uses L-Ascorbic Acid, which is the most effective form of Vitamin C when fresh because the skin can absorb and use it immediately. The kit uses Vitamin E and Ferulic Acid to help stabilize the L-Ascorbic Acid.

On the other hand, Ascorbyl Glucoside (AA-2G™), also known as Stabilized Vitamin C (Liquid AA2G™), is a form of Vitamin C that is significantly more stable than L-Ascorbic Acid, even in liquid form or exposed to heat (below 40°C). However, AA2G™ must be converted by enzymes in the skin into L-Ascorbic Acid before the skin can utilize it. This conversion process means its action is not as immediate as readily available L-Ascorbic Acid. The advantage is that AA2G™ is released and absorbed by the skin continuously over a longer period, providing better stability and prolonged efficacy.

In Summary:

• If the focus is on maximum and fastest efficacy when the product is fresh, L-Ascorbic Acid in the tester kit will provide better results.
• If you prioritize product stability for longer shelf life and consistent, sustained action, AA2G™ is a better choice in terms of stability.

Therefore, substituting the Vitamin C in the tester kit with AA2G™ will result in a more stable product that lasts longer. However, the immediate efficacy might not be as high as a freshly prepared L-Ascorbic Acid formula. Nevertheless, AA2G™ still provides good benefits in terms of brightening and antioxidant effects, just in a form that acts more gradually.

When using AA2G™, it is necessary to adjust the formula's pH to the range of 6.5-6.8 for optimal stability. This may require using a Citrate Buffer or L-Arginine to help adjust the pH.