Using L-Ascorbic Acid and Alpha Arbutin: Waiting Time Between Applications
Question
Can L-Ascorbic Acid and Alpha Arbutin be used together in a skincare routine? If so, how should they be applied, and is there a recommended waiting time between applying the L-Ascorbic Acid product and the Alpha Arbutin product, considering their different optimal pH levels?
Answer
Based on the discussion, you can use L-Ascorbic Acid and Alpha Arbutin sequentially.
The main point to consider is the pH level. L-Ascorbic Acid is typically formulated at a low pH for stability and efficacy. Alpha Arbutin, however, can be degraded in a low pH environment.
If you apply a high concentration L-Ascorbic Acid product first, it will temporarily lower the pH of your skin. Applying Alpha Arbutin immediately afterward might expose it to this low pH, potentially reducing its effectiveness or stability.
To avoid this, it is recommended to wait a period of time between applying the L-Ascorbic Acid and the Alpha Arbutin. This allows your skin's pH to return to a more neutral level, which is more suitable for Alpha Arbutin.
While there's no exact fixed time, waiting around 10-15 minutes is generally suggested as a safe estimate to allow the L-Ascorbic Acid to absorb and the skin's pH to recover sufficiently before applying the Alpha Arbutin.