This research focused on a green synthesis of silver nanoparticles (AgNPs) using the serum from skim natural rubber latex (SNRL). which is simple and low cost. Chitosan in acetic acid was used as a coagulant to remove rubber particles from SNRL. This leftover serum was diluted with the same amount of water and used as a source of reducing agent in the synthesis of AgNPs. https://herbsdailyes.shop/product-category/medical-and-ambulatory-supplies-diagnostic-instruments-and-supplies/