Mixing Vitamin A with C E Ferulic Serum

Subject: Mixing Vitamin A with C E Ferulic Serum

Based on the staff's response, it is possible to add Vitamin A (like Retinyl Palmitate/Retinol Palmitate) to a Vitamin C E Ferulic formula, but with certain limitations.

Key points:

• Concentration Limit: Vitamin A should not exceed 1.0% of the total formula to avoid skin irritation.
• Stability: Adding too much Vitamin A can cause the mixture to separate or become cloudy because the amount of emulsifier (like Laureth-23) in the C E Ferulic formula is balanced for its original oil content.
• Mixing Method (for kit formulation): If you are adding Vitamin A to the Vitamin C E Ferulic kit formulation, it is recommended to dissolve the Vitamin A in Laureth-23 first before incorporating it into the main mixture, following the standard kit instructions.

Please note that the staff's advice seems to be for mixing into the kit formulation. Mixing ingredients into a finished product can sometimes affect its stability and effectiveness.