Dead-Sea area, and at a level of use of 1%, generated TMAC results of <10, therefore allowing either avoiding the costly radiation process, or changing from an existing harsh preservative to a consumer-oriented option. The next step was testing the efficacy in a formula containing 20% Dead-Sea mud.
Challenge test was performed on non-radiated mud, with the preservative AM25 at a level of 1%. Additional challenge was done to a formula with 20% treated mud, with AM25 at a level of 0.7%. both tests passed with great results: after 48 hours all 5 microorganisms had a significant log reduction to <10, showing the flexibility of the system to handle both high risk material, as well as treated one at a low usage.
The same study was performed on Bentonite and Kaolin face mask, with similar good results, with Sharomix™ AM20. To answer the call for phexnoyethanol-free preservation in facial products, a similar study was executed with Sharomix™ AM24.
This system, used on the same tough-to-preserve formula containing 20% mud, successfully preserved the product at a level of 0.8%. I
n conclusion, a naturally derived ingredient does not guarantee safety. In the world of preservation, it is often the opposite.
When formulating facial care products with such ingredients we must take all this into account and search for the right solution to answer all aspects: efficacy, formula compatibility, product claims, regulation and of course, safety.
