Disclosed herein are lipid nanoparticles including a POEGMA-lipid conjugate that can effectively encapsulate and deliver therapeutics without the immune consequences suffered by PEG-based counterparts. An example lipid nanoparticle includes an ionizable lipid, a phospholipid, a sterol, a POEGMA-lipid conjugate, and a therapeutic. Also disclosed herein are pharmaceutical compositions that include the POEGMA-based lipid nanoparticles, methods of treating a disease or disorder, and methods of delivering a therapeutic to a cell.