4meSM
Bluelighter
That's the report I mentioned in my first post, the 2008 microgram journalI would direct you to page 36 of this link. It’s a bit dated but this is proof from the DEAs own analysis that there is truth to this happening “in the wild” … if it was found in 2007/2008, what’s to say it wouldn’t still be happening?

Regarding my previous post (the one you quoted), I apologize for the lack of clarity, I wrote it pretty quickly and didn't bother to explain what I actually meant.
N-iso has definitely been found in meth samples before, no one is disputing that, but most serious reports (specially the ones from the DEA) stopped mentioning it 7+ years ago.
Of course it hasn't completely disappeared from the face of the earth, it is occasionally found in samples (mainly in SEA/Oceania), but it seems that it's no longer a common cutting agent.
What I was mainly referring to was the incorrect assumption that a large percentage of today's meth is fake and that the quality has gone and continues to go downhill. Many "meth enthusiasts" seem to think that n-iso is everywhere and that it has pretty much replaced real meth, it has become a pretty widespread myth.
I actually used to think that n-iso was much more prevalent, but then I started looking into it and ended up changing my mind.
So, according to that narrative, n-iso is pretty much meth's evil twin... It's apparently active as a stimulant almost like meth, except for the fact that it can cause pretty much every side effect imaginable.
AFAIK that's almost entirely wrong (and I've done research about it), yet it keeps spreading. There are many posts talking about batches of fake meth all over the internet. Many of such posts can be more or less summarized as follows : "feels/looks similar to meth but it has to be fake because - some side effect, I don't feel euphoric, not the same as before, etc.- Therefore it's probably n-iso".
There's no connection between any of that stuff and n-iso, in fact it has never ever been found in any of those bad batches people are talking about (if anyone has a source to prove me wrong please share it).
The graphs I posted on the previous page show that purity declined during the period of ~2005-2009, this was due to a few factors such as new legislation(s) which limited the access to precursors. Interestingly, the decline in purity correlates with the presence of n-iso.
Somewhat ironically, I've seen many comments reminiscing about the product from the 2000-2010 era and describing it as superior compared to what we have today (which is significantly purer according to every reliable source).
Perhaps it's because many seasoned users went through their honeymoon phase somewhere during that time?
After 2009 the cartels managed to adapt to the situation and began implementing new processes to produce high quality d-meth (bypassing the need for pseudo/ephedrine). They clearly upped their game successfully, meth purity has risen dramatically since then (with a very minor dip around the year 2015).
Well, that ended up being a fairly long post. Guess I've said my piece.
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