If you want to have a conversation then you need to converse like and adult, drop the toilet talk.
The link you provided to e r o i d s proves nothing.
We have no idea of the purity the YK-11 that guy was using.
He even stated the he thought the RAD140, from the same supplier as YK-11, was actually letrozole.
Actually we are talking about "the 17aa-shit that really tax the liver."
Here's a short Chemistry lesson.
An alkyl group is a pice of a molecule with the formula C
nH
2n+1, where n is a whole number.
A methyl group is an alkyl with the formula CH
3.
17 alpha alkylation (17aa) is the addition of an alkyl group to the alpha position of the 17th carbon of the steroid backbone.
YK-11 is a 17aa anabolic steroid.
Steroid backbone
YK-11
There is no reliable data available on it's liver toxicity other than it's chemical structure.
We need to wait for peer reviewd data from animal or human testing before drawing any concrete conclusions.
Until this takes place we should place more faith in The Laws of Chemistry over an e r o i d s thread.