I think regulators just have different attitudes, often about arbitrary points. For a while the EU had many artificial sweeteners that weren't allowed in the US.
EU regulators seem less bothered by psychiatric medicines that have serious side effects (agranulocytosis) or might make you have your liver enzymes checked periodically. What you find is that EU regulators permit things that US regulators won't accept and vice versa.
EU regulators seem less bothered by psychiatric medicines that have serious side effects (agranulocytosis) or might make you have your liver enzymes checked periodically. What you find is that EU regulators permit things that US regulators won't accept and vice versa.