Quick info

GBL (gamma-butyrolactone) and BDO (1,4-butanediol) are GHB precursors, i.e. they are converted by the body into GHB (gamma-hydroxybutyric acid). GHB is closely related to the body's own gamma-aminobutyric acid (GABA) and activates certain GABA receptors. GABA is the most important inhibitory neurotransmitter in the brain and regulates, among other things, the sleep-wake rhythm, memory functions and growth hormones. Depending on the phase of action, dosage and individual metabolism, GHB/GBL/BDO can have a stimulating as well as a relaxing and calming effect. In medicine, GHB is used in the treatment of narcolepsy and in some countries also to treat withdrawal syndrome in alcohol addiction.




Safer Use

Mixed use




LSD analogues


Synthesis impurities


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