The final word Guideline to GBL: Gains, Works by using, and Protection Ideas ???? ???? What exactly is GBL? GBL (Gamma-Butyrolactone) is really a chemical compound greatly used in industrial and pharmaceutical apps. It is a precursor to GHB (Gamma-Hydroxybutyrate), a substance known for its sedative and euphoric outcomes. GBL is often present in c