Stability of Water-Soluble Actives in Glycerin Soap
Question
Can water-soluble active ingredients, such as vitamins intended for skin brightening and acne reduction, be effectively incorporated into a glycerin soap base, considering the high pH environment?
Answer
Based on the previous discussion, water-soluble active ingredients, including vitamins, are generally not stable in the high alkaline environment of glycerin soap and their effectiveness would be significantly reduced or destroyed. The staff mentioned that all water-soluble active ingredients cannot withstand this high alkalinity.
Therefore, unfortunately, there are no vitamins that can effectively provide skin brightening or acne reduction benefits when incorporated into a glycerin soap base due to the high pH. While horse oil is compatible with the soap base, it primarily offers moisturizing properties and may not address the user's specific goals of brightening and acne treatment as effectively as other ingredients might in a different product type.
Given these limitations, it is not possible to formulate a glycerin soap with effective vitamins for the desired results (brightening and acne reduction).