GBL (Gamma butyrolactone, geeb)   GBL (gamma butyrolactone, ‘geeb’) is a clear liquid solvent. It is a prodrug for the illegal substance GHB, which means that the body naturally converts it into GHB.   It is sold in the grey market, often as ‘alloy cleaner’ or ‘rust remover’ and smells pretty much like you’d expect an industrial solvent to smell … Continue reading Drugs – GBL – Gamma Butyrolactone