Dermatologically Approved & Non Irritant
The entire zk'in product range has been independently tested and approved as non irritant by a dermatologist. Patch testing of zk'in products on human volunteers aged from 19 to 63 years of age, followed by a medical evaluation of the tolerability of finished products. All products were declared "dermatologically tested and approved non irritant", or “dermatologically tested on sensitive skin and approved non irritant”, depending on skin type the products were designed for. zk'in products scored 0 irritancy in every test and in every category – not a single irritation of any kind! This is a remarkable result and one we are very proud of.