GBL is often a prodrug of GHB and its recreational use comes fully due to this. GBL overdose could cause irrational conduct, significant sickness, coma and death. This is often one of the better forms of k2 spray for many reasons.k2 spice spray on paper-They can be colourless-its odourless-its undetected https://www.facebook.com/gamma.butyrolactone.gbl