Tren is a very harsh compound, and its effects on the hypothalamus can be rather detrimental if it is used for prolonged periods of time, without a proper post cycle protocol ... that being said, while on cycle as long as you are running testosterone at a dose of even 200mgs every other week ... or 100mgs of a something like test E once a week, libido problems shouldnt affect you ...
in regards to 19 Nor compounds being similar ... they might be similar in the fact that they are modifications of testosterone ... chemically speaking dianabol and eq are chemically quite similar - almost identical, but their effects on the body are very different ... dont ever assume that because things are similar chemically, there effects are similar ... because both Tren and Deca affect the body in different ways ... progesterone issues and libido problems and the fact that they build muscle are probably the only similiarities they have ...
another note, everyones body reacts differently to different compounds ... some people can take EQ by itself and fuck like fucking pornstars ... others lose their libido within weeks ... every person in this world reacts to hormones differently ...
that being said, test is the only hormone that your body will truly recognize as its own ... comming off any cycle is made significantly easier when test is added into the mix ... Tren is a very harsh compound - i always stop it weeks before stopping test ... unless ur trying to eliminate bloat for a comp ... i dnt recommend doing tren by itself - even many pros ... will either take anti-estrogen, ai etc ... or just cut the test out two weeks before a comp ... and then start it back up after their show ... test always makes things easier