There is no difference in terms of estrogen conversion when you inject IM or SubQ. However, you can get a bad ass abscess by injecting the oil SubQ. Therefore, you should always inject it IM in order to prevent this sort of issues.
no.. the issue with subQ injections is the oil will clump up and need longer to dissipate.
you should not inject subQ unless it is a tiny amount of gear. some TRT clinics actually do subQ injections to their clients. if you are using 2 or 3CC's of gear though you will need to do IM
For TRT it works fine and it actually slows release time. But it does nothing in relation to estrogen conversion unless there is any evidence or studies proving so.