Programmed death ligand 1 (PD-L1) is a co-inhibitory molecule expressed on the surface of various cell types and known for its suppressive effect on T cells through its interaction with PD-1. Neutrophils also express PD-L1. and its expression is elevated in specific situations; however. the immunobiological role of PD-L1+ neutrophils has not been fully characterized. https://cosmeticsolutioners.shop/product-category/hair-color-touch-up/