“…It is wrong to assume that platelet-rich plasma injections contain no artificial materials because silicone oil is the commonly used syringe lubricant, and contamination with it has been well reported in literature. 2 , 3 , 4 Whether the patient has a history of receiving a specific injection of a foreign material such as silicone oil itself could matter; however, the awareness that silicone oil is inside every syringe, even before blood is drawn for platelet-rich plasma, is of paramount importance. The number of syringes used in the process adds foreign material volume, similar to botulinum toxin: one syringe for reconstitution and another for injection.…”