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Yeah I found the same thing....I actually went out of my way to make "extra yellowy yellow" using warm naptha on my last batch....just because I have found the yellow effects me more...
and I have smoked both hundreds of times.

I personally theorize that the "impurities" of the plant oils in mimosa contain an MAOI type material...

THis has been a subject of debate however...and I'm no scientist just an avid observer


Welcome BTW!!

It is possible that something carried on over with the white stuff, the amount you were needing to achieve a decent experience points to that or smoking method. I myself think that your yellow stuff is packed with DMT and the white stuff has something else going on. BUT this is viewing just the experience and not scientifically. I'm no pro when it comes to extractions, and a lot of what I know is from the experience of other people.

Although, like Eliyahu says, and others as well, "The yellow ain't mellow, and the white ain't quite right.

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Well if there ARE other things in it then recrystallizing will further separate them out. Also, how many pulls did you do? Seems like you should have gotten a little more than 3grams from 500gram.