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Originally posted by prolangtum Mr. Nipple
What dosages are you running? If prop is under 500mg a week, i woudlnt see too mcuh of a need for l-dex, maybe just .25mg eod. HAve nolva on hand though definitley
I'll be on 75mgs eod of fina and 100mgs of prop eod
I've got 1 box of arimidex already, so will that be good?
and will nolva actually prevent gyno whilst using tren??
Here you go, courtesy of Nandi, i think this is the 4th time i posted this:
Progestins & Gyno
Before you decide that blocking progesterone is the solution to gyno, consider a few things. There is not one case of progesterone induced gyno in the medical literature EXCEPT in those cases where strong synthetic progestins, like medroxyprogesterone, were administered. In these cases the gyno is due to suppression of LH and testosterone by the progestin, NOT by a direct effect on breast tissue. On a cycle your LH is already suppressed by the AAS anyway.
Breasts have two components: alveoli and ducts. The alveoli are what secrete milk; they drain into ducts. Gynecomastia is the result of ductal hyperplasia, not alveolar hyperplasia. Estrogen stimulates the ductal tissue, while progesterone stimulates the alveoli. Alveolar hyperplasia does not contribute to gyno. If you want to read more on breast development, I suggest visiting this site:
In various tissues throughout the body, including cultured neoplastic breast tissue, progestins downregulate the estrogen receptor (1). Progesterone receptor blockers like RU-486 upregulate the estrogen receptor (1). This is consistent with the fact that RU-486 CAUSES gyno in patients in whom it is used to treat Cushing's disease and meningiomas (2).
Progestins are also anti-estrogenic in that they induce the enzyme 17-hydroxysteroid dehydrogenase, which catalyzes the oxidation of estradiol to the less potent estrone. Progestins also induce estrogen sulfotransferase, the enzyme which catalyzes the sulfation and inactivation of estrogens.
So do progestins contribute to gyno, and if yes, how so? If you visit the link above you will see that progestins increase IGF-1 levels. As that article indicated, IGF-1 is essential to the the development of mammary tissue. This is also how it is believed that progestins in HRT or oral contraceptives contribute to breast cancer: by increasing IGF-1 levels. But as bodybuilders we are always trying to maximize IGF-1. Hence the futility of trying to lower IGF-1 by blocking progestins. The other anabolics we use will elevate (hopefully) IGF-1, while blocking the progesterone receptor will only increase the levels and activity of estrogen by the mechanisms outlined above.
Two drugs have shown the greatest efficacy in treating gyno: Nolvadex, and Raloxifene, another SERM. Nolvadex has the longest track record, but a recent trial with Raloxifene showed it to be superior to Nolvadex. With these drugs you attack the problem at its source: the estrogen receptor. You get the added benefit of lowering IGF-1. Not a good thing for making gains, but important for treating gyno.
(1) Int J Biol Markers 1995 Jan-Mar;10(1):47-54
Progesterone agonists and antagonists induce down- and up-regulation of estrogen receptors and estrogen inducible genes in human breast cancer cell lines.
(2) J Neurosurg 1991 Jun;74(6):861-6
Treatment of unresectable meningiomas with the antiprogesterone agent mifepristone.
Grunberg SM, Weiss MH, Spitz IM, Ahmadi J, Sadun A, Russell CA, Lucci L, Stevenson LL.
Department of Neurosurgery, University of Southern California School of Medicine, Los Angeles.
I eat at least 6 times a day to build my body
I pray at least 6 times a day to build my soul
OK....the bromo did nothing for the flareup so I got liquid nolva. I have been off fina for a week (only did it 2 weeks then the flareup started) and the glands have been reduced alot. Should I start again and run it all the way through. I just have a sinking feeling it will flareup regardless of nolva. Man, I realy would like to do 6-8 weeks fina.
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