mitragynine or 7-OH-mitragynine
isolates are usually a ripoff
I don't really like eating bark. Raw or cooked.
To perform a more effective search on bluelight go to 'advanced search' in the search menu and select search titles of threads. Then type in kratom and look for one called "The Kratom Thread", erowid also has lots of more succinct info on it.
There's no way of really knowing what you're getting, methinks most of the "isolates" are just rebranded extracts. Then again, there's no way of knowing what extract you're getting either.
There is a Kratom Thread hanging around Other Drugs somewhere...oh wait, here it is. So check it out.
I've been a fan of the 80x extract mainly because of the portability and lack of having to do a toss n' wash. Your results will vary. Vendor discussion isn't allowed, but use the search engine and use Google too
No sources. A powerful euphoria is hard to achieve as Kratom is not that "powerful" a drug in the way you are thinking and once you get up to high doses the nausea is more present and the antagonists can start messing with your agonists.
I prefer 4grams of regular powder plant so if it is truly 60x (the multiple strengths are generally not worth it) I'd say 1/15th of a gram :S Of course since it probably is nowhere near 60x start with a quarter gram or a half and work your way up I guess.