You're right I don't but I know what DNM vendor advertises I know what super impure tabs are like I've had those they suck. And these tabs from the vendor were THE BEST LSD I've ever had(reagent tested). And I do know exactly how 10x100ug tabs(was told they were 125ug) feels and the only time I've ever had what I believed to be 200ug tabs I know I took 3x and intensity wise I was floored. Not in terms of how long or how high but intensity of the trip how much I was hallucinating and interacting with my hallucinations.

After dosing HUNDREDS of times I can tell the difference between a 100ug 50% pure tab and 200ug 99% pure no lab test needed. Might not be able to tell you exact purity but I can tell you shit tab or not. And like I said these were from a very popular and reliable DNM vendor