this may have been discussed, or may be common knowledge but wanted to share personal experience.

most people, i believe, know the >1hr protocol on tolerance. but it seems on subsequent attempts separated by ~20 mins, adding more and only needing one or two tokes blasts you back from whence you came.

only explanation i can think of is a higher plasma concentration? but im no scientist.

edit: yeah its 20 for me too ... typo

I know of the one hour protocal but i also can get to the same level of hypersace, usually after around 20mins for myself

What are you talking about? AFAIK, the only FDA approved dose/response study established that dmt creates no meaningful tolerance to itself. If that's what you're saying...then yes...you are correct (according to the existing literature). If you are saying that is not the case could you please cite your source?

With changa, I've had as many as six back-to-back launches and no noticeable tolerance...

I have personally encountered no noticeable increase in tolerance between smoked Spice sessions, even within minutes of each other.