Hes right, the only benefit to short esters is the ability to more readily control your blood levels. Depending on how frequently (or infrequently) you plan on pinning your long ester, you may have an undulating release of test into your blood, which when coupled with unsatisfactory use of AI can result in erratic hormone levels. This is generally considered unwise. You can always pin long esters ED too, but if you plan on doing that you might as well use prop to get it in faster and minimize downtime before PCT; I prefer short esters. That is probably the safest route to go, but after having done a ten week cycle pinning everyday with a 1.5'' 23g horse needles, believe me when I tell you that deep IM injections for ED shots blows. Hard. Learn to backload insulin pins to shoot subq and your life will be much easier, and without all the pain, micro scarring, potential nerve damage or vein injects that deep IM shots can do.
Aside from that, it makes no difference concerning gyno, this will be contingent upon:
- Genetic predisposition
- Your understanding and use of AI to control estrogen.
Keep some nolva's if it begins to flare up but ideally you want to prevent it right? Learn how the more popular AI drugs function. I've never used letrozole so I've never really researched it thus I can't talk about it but I can talk briefly about arimidex and aromasin.
Arimidex is a reversible competitive inhibitor thus it interferes with the conversion of T to E by gumming up whats going on at the receptor site itself. Its quite effective at doing so, the standard dose being around .5mg EOD, or as I prefer .25mg ED, with even these small doses dropping estrogen levels by a whopping 80ish %. However the aromatase enzyme that facilitates the conversion of T to E is still floating around, unable to be utilized. For this reason it is unwise to use intermittently, i.e., its useful on cycle while taking it consistently, but not a good idea to take sporadically during pct, or to discontinue use suddenly before pct as all these enzymes floating around can cause a rebound in estrogen levels once they get a chance to work again. (i believe letrozole works in a similar fashion it simply binds reversibly to something on the enzyme itself, and being reversible implies again it would be best with consistent, not intermittent, usage)
Aromasin is a suicide inhibitor, and being structurally similar to aromatase targets, binds to the aromatase enzyme itself, halting the conversion of T to E by rendering the enzyme inert. Its not as effective, the standard dose being 25mg/day (preferably dosed 2x a day at 12.5 mg and consumed with fat that facilitates its absorption). However, considering that it does away with the aromatase enzyme until your body produces more, aromasin is better suited for intermittent use, such as during pct. Some would recommend not using AI at all during pct, but since pct drugs in fact do raise testosterone levels above normal it may be useful to have some on hand (particularly if you are not using nolva, which you should be using).
Identifying the signs of high or low estrogen is important too as it allows you to tinker with your dosage. You don't want too high estrogen but you don't want to tank it either. Assuming you arent a scientist and won't be doing blood tests on the daily, you kinda have to go by feel. Rule of thumb is as follows:
Libido loss and water retention: too much estrogen
Libido loss and dry/achy joints: too little estrogen
Start at the standard dose and adjust accordingly. Some will claim that they dont use any AI during cycle, I would suggest this is unwise, particularly for those with a predisposition towards gyno, however there are worse things to contend with when dealing with high estrogen levels in the male body, things not so obvious either.
*On a side note, I'm not particular prone to gyno but I have experienced swollen nipple glands before. I believe this to have occurred from using too many 'types' of steroids at the same time. Alot of them have different mechanisms of action, are or mimic different hormones, etc, but some of them work along the same lines and I think I experienced this response to a bit of overlap. I think 3 compounds at a time is a good number, 3 injectables or 2 and an oral work fine for me, maybe changing some out for others or tinkering with doses during cycle. Of course I'm sure some take way more, but I havent yet and can't comment on how to do that safely.
hope this helps