We define the safe range for every component we use with the same scientific process used by regulatory agencies around the world (FDA, EPA, WHO, EU, etc.). All our components are rigorously selected, evaluated, and meet or exceed the requirements of applicable European (e.g. REACH, cosmetic regulation, in so far applicable) and French regulations. If there is not enough information to establish a safe range, we will be cautious and remove the component from consideration or investigate it further with additional data. Over 1,000 quality tests are run on tampon materials before they are used in manufacturing.