Mixing Custom Serum Formula with Peptides and Vitamin C Stability

Regarding your question about mixing the Vitamin C E Ferulic tester kit with additional ingredients and your proposed formula:

1. Custom Mixing Service: As the staff mentioned, the company cannot provide a custom mixing service for your formula. You would need to mix it yourself.
2. Your Proposed Formula: Your proposed formula includes Purified Water, Triethanolamine, Ferulic Acid, Ethoxydiglycol, Light Cream Maker, d-Alpha Tocopherol, Acetyl Hexapeptide-8 (10g), Matrixyl 3000 (5g), and L-ascorbic acid (15g), totaling 99g. This formula incorporates the additional active ingredients you wanted at your desired concentrations, along with components typically found in a Vitamin C E Ferulic type serum.
3. Vitamin C Stability: As the staff advised, adding ingredients not originally in the Vitamin C E Ferulic formula, such as Acetyl Hexapeptide-8 and Matrixyl 3000, can potentially affect the stability of L-ascorbic acid (Vitamin C). The original kit's formula is designed to help stabilize Vitamin C.
4. Self-Mixing: You can attempt to mix the formula you proposed yourself. Acetyl Hexapeptide-8 and Matrixyl 3000 are water-soluble and can be incorporated into the water phase. However, please be aware of the potential impact on Vitamin C stability.
5. Safety: For personal use, mixing these ingredients within the manufacturer's recommended usage rates is generally not dangerous, even if the Vitamin C stability is reduced. If you were mixing this for sale, stability testing would be crucial.