The U.S. Food and Drug Administration is considering requiring companies to conduct new animal tests for several sunscreen ingredients that have been in use for decades. If this happens, companies would be forced either to test on animals or be limited to just two ingredients to produce sunscreen and products containing SPF (sun protection factor).  

Because these ingredients have been used for so long, there is an immense amount of real-world human health data, data from past animal tests and data from non-animal test methods already available. If the FDA does decide that new safety information is needed, methods that use sophisticated technologies instead of relying on outdated animal tests would be much more effective.