I go to Shambhala and they do free drug testing. Every LSD I get, I get it tested. The Ehrlich reagent test turns purple for indoline structures and it’s so much easier to get LSD than the other LSD prodrugs that would cause this to be purple, like 1P-LSD, 1V-LSD, or 1B-LSD. Research from both DanceSafe and The Loop show that actual and pure LSD dominates over synthetics at music fests. I’d love to see your sources because I’m intrigued.