Copper Peptide Serum Formulation, Penetration Enhancer, and Using with Vitamin C

Hello! Thank you for your question. I understand you're new to this but serious about skincare, especially after dermarolling. I'm happy to provide guidance.

Based on your proposed Copper Peptide serum formula and the staff's advice, here is a summary and further recommendations:

1. Is the proposed Copper Peptide serum formula viable, and is a penetration enhancer necessary?

• Formula: The formula you provided can be mixed.
• Preservative: The staff recommends replacing Phenoxyethanol 0.5% with Phenoxyethanol SA (Optiphen Plus) 1% for better preservation and reduced potential for skin irritation.
• Penetration Enhancer: Yes, a penetration enhancer is necessary to help Copper Peptide and other ingredients penetrate the skin more effectively. Especially after dermarolling, where skin permeability might be increased, using an appropriate enhancer will help maximize the benefits of the ingredients.

2. Which penetration enhancer is recommended and at what percentage for maximum efficacy?

• The staff recommends using Laurocapram (Azone) at a concentration of 2% as a penetration enhancer in the Copper Peptide serum formula.

Thus, the adjusted Copper Peptide serum formula based on the recommendations would be approximately as follows (adjusting distilled water percentage accordingly):

• Distilled Water: ~92.5%
• Hyaluronic Standard: 0.5%
• Hyaluronic Nano: 0.5%
• Copper Peptide (GHK-Cu): 3%
• Phenoxyethanol SA (Optiphen Plus): 1%
• Laurocapram (Azone): 2%
• (Total 100%)*

3. If using Copper Peptide together with Vitamin C, is applying them 1 hour apart acceptable?

• Yes, applying Copper Peptide and Vitamin C separately at different times, with an interval of about 1 hour, is the correct approach and is perfectly acceptable. Using them separately helps each ingredient work at its maximum efficacy without interfering with each other.

I hope this information is helpful! If you have any further questions, feel free to ask.