After reading a bunch of very promising reports I would like to try NSI-189 as well but have some problems finding a valid source for buying. It looks like a lot of people buy it off eBay and verify purity afterwards. eBay has a ton but I am still very new to powders and supplements and very unexperienced in the field.
Assuming I buy some powder off eBay and it arrives here, what would be the next steps to verify it's actually what I ordered?
I live in Tokyo, any tips on finding a lab that could do a analysis for me? And how much does that usually cost?