DB Lab performs challenge test of cream, shampoo and other products where documentation of the antimicrobial efficacy is required, either on the finished product or added preservatives.
We perfom our challenge test according to the current edition of Ph. Eur. 5.1.3. Efficacy of Antimicrobial Preservation.
In this method, the product's ability to eliminate or inhibit specific test microorganisms is tested over a period of 28 days.