GNC Holdings, the seller of health and nutrition products, sued CC & PW Trading Inc. Monday in Pennsylvania Western District Court over trademark claims. The lawsuit, filed by Vorys, Sater, Seymour and Pease, accuses the defendant of selling GNC nutritional supplements on Amazon without authorization. Lawyers have not yet appeared for the defendants. The case is 2:21-cv-01398, GNC Holdings LLC v. CC & PW Trading Inc. et al.