Is the PLA in the Electric Toothbrush Head compostable?Updated a month ago

Yes! In simplest terms, PLA is derived from corn, so it can be treated as such. The organizations validate that PLA can be composted in industrial facilities:  ISO (Global standards), ASTM (American Standards- ASTM 6400 is the Standard Specification for Labeling of Plastics Designed to be Aerobically Composted in Municipal or Industrial Facilities), and EN (EU standards) regulations.