Ingredient Science
Preservative Selection: Beyond the Challenge Test
Brands often treat preservation as a test to pass. It is closer to a design decision with four inputs, and get…
Insights & Guides
Everything we have learned from 15 years of manufacturing for global beauty brands — shared openly.
Certifications
Preservative Challenge Testing Explained for Brand Owners
A preservative system that works in one formula can fail completely in another. The challenge test is how you …