AI's work differently. some block the receptor not allowing you to take up the estrogen, others bind to the estrogen and make the unable to be taken up. i prefer to kill the estrogen rather than just block it, this way i dont deal with any rebound issues, especially in PCT which is the most likely time for it. i prefer two AI's arimidex and aromasin. adex will block it and aromasin will kill it. these are dose dependent. run what u need. start low and work your way up. avoid low estrogen, it inhibits gains and can cause injury if the muscles or ligaments and tendons become to dry.

Without going into too much detail for the sake of time this morning. Arimidex is an AI that behaves as a blocking agent to the enzyme aromatase subsequently BLOCKING the production or release of estrogen into the body. Adex can rebound if taken in high doses and should have a slow ramp down period.

Aromasin is called the suicidal armatase inhibitor. It does this by blocking the enzyme responsible for synthesizing estrogen. This means the excessive test floating around is not even allowed to covert to estro and therefor needs no blocking. Aro has been known to be used up through PCT to even aid in recovery though I have read no peer review journals or articles with labs to verify that so I can not speak from experience on it. Though I have used adex and aro both as my AI's in the past.

Letro is like going squirrel hunting with a cannon. It must be ramped up by .5 to your intended dose and is the only AI I know of to mitigate and diminish greatly gyno and latent gyno flare ups. It can be used in a cycle but is very harsh on the joints as it drys you out drastically and not necessarily in a ripped shredded competition way. If taken in higher quantities to reverse true gyno you must taper off and then use a serm like Nolvadex to prevent rebound. Letro kills your estro entirely and that is not a good thing when trying to make gains. I love letro for the purpose of reversing hard painful lumps but not as my main AI.

You can read through my profile and review my labs. I have explanations of all my labs and what I was taking and why. You will see the estro difference with each ai.

On another note what is your cycle going to be? Why are you taking test cyp a long ester that only requires one shot every two to three days or even four for a beginner cycle with tren ace? Tren ace has a half life of one day and thus requires daily injections for stable plasma levels and maximum gains. Something is not adding up and you have not mentioned caber.

I think all of them work fine.. Now some people respond differently to different AI's.. Honestly it's just one of those things where you have to try them out for yourself.. I think aromasin is dumby proof since there isn't any rebound from it but it'll also cost you a little more to run with a cycle having a shorter half life.. If you're reasonable with your dosing there should be no issues with adex or letro

Adex. 0.25mg eod.

I love letro!! but the problem is that with your cycle, it will be hard to get a good dose for it, as in the tablets come in 2.5mgs and that's to much letro for your cycle