This is a great question to ask. If you look at the GRAS list, some molecular weights of PEG are GRAS while others are not. There’s no reason to think other polymers should be different.
GRAS is “Generally Recognized As Safe”: so for example you don’t need to do a study on its safety when using it in a drug formulation.
GRAS is “Generally Recognized As Safe”: so for example you don’t need to do a study on its safety when using it in a drug formulation.