I would caution against ideas like "effectiveness". There is no "better" version of a peptide.
I'll also throw in my standard caveat that the "purity" in lab tests you see don't mean what most people think. Its a measurement of peptide degradation and VERY rarely something else might show up there. So think of 99% tirz as "of the tirz that was in vial, 1% of it has broken down to no longer be effective" And the by-product of the degradation is believed to be perfectly safe.
So that out of the way, given 2 different vendors testing the same mass/purity. You're getting the same tirz from both of them. Contaminants are really just based on faith and reputation. Fortunately, by products of peptide manufacturing are mostly benign.
So any claims of X's tirz is so much more effective than X's is just in their head.
So specifically Amo, they had a history of underfilling mass by around 10% but that seems to have been fixed this summer. They have always tested high purity and since using vacuum vials have been pretty accurate on their fills. They (like nearly every vendor recently) have had some sterility test failures. (I recommend everyone just filter their peptides always)
There have been numerous reports of a mystery stinging after injection in r10,t10,t15, and t30 as I can recall. They have been pretty good about replacing the product upon proof of destruction.
My wife and I have been using their T60 for a month. Works as expected. I have begun to develop a histamine response which isn't unheard of for numerous peptides. No ISR from my wife. My sister is just starting on the S10. dionysus has probably used them longer than most people here though.
If you really want to pay with a credit card they are fine, nexaph also takes credit cards and probably has better quality finishing but the owner is a known liar so I don't trust him.
