I don't know; I have tried 1P up to 700 ug and it was, to me, in no way, shape or form like LSD. It was far shallower, less visual, less profound, with limited headspace for me, even at high doses. Other than being a hallucinogen, and inducing some of that which comes with consuming them, I found 1P a compound that feels lacking. But that's just me. Also, I've done up to 450ug of eth-lad, and it was not, in any way, LSD-like. Is it a hallucinogen? Yes. Does it affect the body and mind as one. Yup. Does that resemble LSD in an equivalent dose? Not for me. I've done a LOT of LSD, and I was around for the great era of outstanding LSD through the 80's and 90's, getting some of the best LSD there was available. My world was changed by big LSD trips, and I had truly mystical experiences, at times. I've had nothing of the sort from Nbomes, AL-LAD, LSZ, 1p-lsd, eth lad, or any other hallucinogen for that matter. I don't know...I just really don't get people saying "indistinguishable from LSD".