I'm really tired of the high E crowd.
They are correct in stating that crashing estrogen is bad, and that AIs are easily overdosed, but they take things way too far in an attempt to reinvent the wheel and to make a name for themselves. Hell, they even go so far to suggest that gyno is not causes by excess Estrogens to defend their quackery
Let's stick to the case of TRT. The goal that everyone agrees on is to reach a testosterone level in the high-normal range, and to keep blood levels as stable as possible with frequent injections. But when it comes to Estrogen levels, the high E crowd suddenly abandons that idea and claims that 'the more Estrogen the better, Estrogen is amazing and has only positive effects' (I'm exaggerating only slightly). Yes, Estrogen does have an important role in males. That's why we should strive to keep it in the normal range. But high Estrogen also has side effects, among them gyno, female-type body fat deposits (mostly around limbs), subcutenous water retention, prostatic hypertrophy, and more. Some of these side effects are especially prevalent when Estrogen/Androgen
ratio is high, but high E even in combination with high androgen levels can cause side effects.
Hence, with Testosterone in the normal range, we also want Estrogen in the normal range. But this is far from guaranteed. Yes, most men on TRT with dialed in T levels will also have normal E2 levels. But for some (with certain genetic factors and lifestyles) E2 will be out of range. In that case, you should use an AI, BUT AT A DOSE THAT WILL NOT LOWER E2 TOO MUCH. That is, at a
very, very low dose. Given the cumulative effects of suicidal AIs, the dose should even be tapered down to an even lower maintenance level. That way, AIs can in fact be used to achieve stable E2 levels in the normal range. Arguably, SERM use is a more foolproof way of controlling Estrogen, but long-term use is not something I would recommend given that there is a better alternative. I'm not gonna get into the moronic argument made here earlier about the distinction of tissue and serum Estrogen level. Let me just point out that the decrease of Aromatase activity with AIs is proportional to the prior Aromatase concentration in tissues. In general, the distinction between serum and tissue E2 levels is much less important that was suggested above. Anyway.
So the upshot is this: On TRT, get frequent blood work. If E2 is above range, use AIs,
at an appropriate dose. The target for E2 should be in the high-normal range. However, some people (e.g. those with preexisting gyno) may be symptomatic in that range. For those people, the target E2 levels should be lower, but never below the normal range. In the rare case that E2 side effects cannot be controlled without crashing E2,
then a SERM is a better alternative.