The Ultimate Guidebook to GBL: Positive aspects, Makes use of, and Protection Ideas ???? ???? What's GBL? GBL (Gamma-Butyrolactone) can be a chemical compound widely used in industrial and pharmaceutical apps. It is just a precursor to GHB (Gamma-Hydroxybutyrate), a compound known for its sedative and euphoric results. GBL is often located in clea