The last word Guidebook to GBL: Rewards, Utilizes, and Basic safety Recommendations ???? ???? Precisely what is GBL? GBL (Gamma-Butyrolactone) is a chemical compound broadly Employed in industrial and pharmaceutical applications. This is a precursor to GHB (Gamma-Hydroxybutyrate), a compound noted for its sedative and euphoric effects. GBL is ofte