Preservation of Toner with High Witch Hazel Content
Question
If I use the Witch Hazel (Distillate - Alcohol Free, Paraben Free) product from MySkinRecipes in a toner formulation at a concentration exceeding 60 percent, do I need to add additional preservative?
Answer
Based on the product information for Witch Hazel (Distillate - Alcohol Free, Paraben Free), this product is already preserved with Benzoic Acid.
When you use this Witch Hazel at a high concentration (over 60%) in your toner, you are including its existing preservative system in your final formula. The product is designed for use up to 100%, suggesting its inherent preservation is intended to be effective even at high percentages.
Therefore, adding an additional preservative might not be strictly required. However, it is always recommended to ensure the overall preservation of your final formulation, especially if you are adding other ingredients that could affect the stability or microbial load of the product.
