ZIAJA means quality guarantee
- Each formula is prepared with great care in accordance with the requirements of European Union cosmetic law.
 - We use the highest quality ingredients of mainly natural origin.
 - We use the environmentally-friendly, biodegradable ingredients.
 - We apply continuous monitoring during and after production of our cosmetics, even after their introduction.
 - The preservatives addition is minimalised to decrease the allergy risk "as much as necessary, but as little as possible".
 
All Ziaja products are subjected to a variety of tests:
- physico-chemical, microbiological and stability tests,
 - analysis of ingredients and mixtures used in terms of safety assessment,
 - packaging tests and their compatibility with products formulas in vivo efficacy testing carried out with modern measuring equipment,
 - dermatological and application tests conducted under the supervision of specialist doctors,
 - product safety assessment carried out by experts in the certified institutions.