Nolvedex will prevent you from producing more estrogen, it wont remove what you already have...Letro and or Femara will actually reduce the estrogen levels to almost 0 in the body and I beleive you should only run it for a week or so...Ive always run nolvedex from cycle start to finish...that way ya dont produce estrogen throughout...to much HCG can give you gyno as well...so one week of letro and then the nolvedex
Nolvadex doesn't lower estrogen. Here's a cut & paste from a nolvadex article:
Nolvadex is commonly referred to in quite a few ways: as a SERM (Selective Estrogen Receptor Modulator), as an anti-estrogen (that is actually incorrect, as we will later see), and finally as a triphenylethylene. I happen to stick with calling Nolvadex a SERM, because out of my three options, it happens to be correct (as we know that calling it an anti-estrogen is incorrect), and pronouncable (as we know that I have no idea how to say "triphenylethylene"). Selective estrogen receptor modulators (SERMs) act as either estrogen receptor agonists or antagonists in a tissue-selective manner, lets see what that means to us.
Nolvadex actually has quite a few applications for the steroid using athlete. First and foremost, it´s most common use is for the prevention of gynocomastia. Nolvadex does this by actually competing for the receptor site in breast tissue, and binding to it. Thus, we can safely say that the effect of tamoxifen is through estrogen receptor blockade of breast tissue (1), especially since total body estradiol increases with use of tamoxifen. Clearly, if you are on a cycle which includes steroids which convert to estrogen, you may want to consider nolvadex as a good choice to run along side them.
Nolvadex, however, is not the most potent ancillary compound we can use on a cycle, but it is probably the safest considering it doesn´t actually reduce estrogen in your body keeping some estrogen floating around could have many benefits on muscle growth, as well. Estrogen is also important for a properly functioning immune system, and not only that, but your lipid profile (both HDL and LDL) should also show marked improvement with administration of tamoxifen (4). Many bodybuilders actually use this stuff during their cycle for the health benefits provided by it. If, however, you are preparing for a bodybuilding contest, you need to use something which will suck most (if not all) of the estrogen out of your body. I am speculating that you may be able to use Nolvadex for the majority of a contest prep cycle, to keep yourself relatively healthy, and then switch over to Letrozole for the last 8 weeks.
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