I bought research arimidex from a company I heard about on another forums and I still got gyno symptoms two weeks into my cycle and using a higher dose did not make the symptom go away. I'm pretty sure i got bunk shit from those fuckers. I ordered Liquidex ai from N2BM after reading about it...
N2Burn is in tablets and yes you can use expired, I did and it worked fine. I got a few bottles when they dropped the price way down to like $10 each, and have used them all expired.