Using L-Ascorbic Acid with Copper Peptide (GHK-Cu)
Question
Can L-Ascorbic Acid and Copper Peptide (GHK-Cu) be used together in a skincare routine, considering their different optimal pH ranges? If they are applied sequentially, is waiting 20 minutes sufficient, or should they be used at different times of the day to ensure optimal effectiveness of both ingredients?
Answer
Using L-Ascorbic Acid with Copper Peptide
Based on the product information, L-Ascorbic Acid and Copper Peptide have significantly different optimal pH ranges for their activity.
- L-Ascorbic Acid: Works best in formulas with a low pH (around 2.0-4.0).
- Copper Peptide (GHK-Cu): Has optimal stability and effectiveness in the pH range of 4.5-7.4.
Applying L-Ascorbic Acid, which is highly acidic, will lower the skin's pH. Waiting only 20 minutes before applying Copper Peptide is likely not enough time for the skin's pH to return to a level suitable for Copper Peptide to function effectively, which can reduce the efficacy of the Copper Peptide.
Therefore, it is recommended to use products containing L-Ascorbic Acid and Copper Peptide at different times of the day, such as using L-Ascorbic Acid in the morning and Copper Peptide in the evening. This allows each ingredient to work at its optimal pH level without interfering with the other.
