A 96 hour patch test on a panel of healthy men and women all of whom have medically diagnosed eczema. The protocol that we follow is an international standard to determine the irritation potential of a cosmetic product.
The protocol involves applying a patch to the skin containing the product for 4 days. At the end of each day the patch is removed, and the skin assessed by an expert for any sign of irritation. The products are tested against both a positive control and negative control to demonstrate the validity of the test.