does consuming riboflavin complement a release of GHB en vitro? supposedly my first dose of G was just that, an overdose of riboflavin designed to convert to GHB en vitro. the material was bright yellow, very sour and sold as a ice pop. classic ghb type inebriation commencing 20-30 minutes after consumption. this was a few years ago. riboflavin is a hard substance to buy as a mono ingredient I have found.