Vitamin C Serum Formulation: Ingredient Percentages and Stability
Question
I am developing a Vitamin C serum formulation for skin brightening. I would like to know if my proposed formula is feasible and what are the recommended percentages for Xanthan Gum and Vitamin E. I am also considering including Ferulic Acid. What are the considerations for stability, especially regarding Vitamin C oxidation when dissolved in water?
Answer
Hello! Regarding your question about the Vitamin C formula for skin brightening, the proposed formula is generally feasible.
Based on the staff's recommendations:
- For Xanthan Gum, it is recommended to use only 1% as 2% might result in excessive thickness.
- For Vitamin E, it is recommended to use 0.1% to avoid stickiness in the formula.
Other ingredients can be mixed as planned. You can omit Ferulic Acid if you intend to use the product quickly to avoid oxidation. However, please note that the shelf life of the formula will be short because Vitamin C oxidizes quickly when dissolved in water, as you are aware.
Related Products Mentioned
Vitamin E (Tocopheryl Acetate)
Pure-Ferulic Acid™
Vitamin C (L-ascorbic acid) (Ultra-Fine)
