Estrogen and gains

[Gears]

I`ve read the thread on how AI`s will effect your gains because estrogen is important to put on muscle. Now what about SERMS like nolvadex? Will you make slower gains on the parts it blocks the estrogen (chest)? Or is it based off of your total body estrogen?

[Merc..]

Nolva lowers IGF [ which can reduce gains ] ...

Merc.

[Merc..]

Tamoxifen reduces serum insulin-like growth factor I (IGF-I).Pollak MN, Huynh HT, Lefebvre SP.
McGill University, Montreal, Quebec, Canada.

Antiestrogens are widely used in the management of hormonally responsive breast cancer in both adjuvant and palliative settings, and are currently being evaluated as chemopreventive agents. The classical mechanism of action of these drugs involves inhibition of estrogen-stimulated neoplastic cell proliferation by blockade of estrogen receptors present on breast cancer cells. This paper reviews recent clinical and laboratory data that suggest that the commonly used antiestrogen tamoxifen also acts to reduce serum IGF-I levels. Estrogens appear to play a permissive role in growth hormone (GH) release by the pituitary gland and GH is known to stimulate IGF-I expression by hepatocytes. It is therefore possible that blockade of estrogen receptors in the hypothalamic-pituitary axis by tamoxifen interferes with GH release, leading to reduced hepatic IGF-I expression. In view of results suggesting that IGF-I is a more potent mitogen than estradiol for breast cancer cells and data demonstrating a positive correlation between estrogen receptor level and IGF-I receptor level of breast cancer cells, the IGF-I lowering effect of tamoxifen may contribute to the cytostatic activity of the drug. The interrelationships between steroid hormone physiology and IGF-I physiology may have relevance to a variety of commonly used treatments for hormonally responsive cancers.

PMID: 1421427 [PubMed - indexed for MEDLINE]

[Gears]

I didn`t know that, thanks. Do there happen to be charts on how much Nolvadex effects gains compared to those without it both on the same dosage/type aas?

[Merc..]

I didn`t know that, thanks. Do there happen to be charts on how much Nolvadex effects gains compared to those without it both on the same dosage/type aas?

It would "[vary]" for each individual ...



Merc.

[Gears]

I understand it will vary, but I don`t suppose there is a chart with at least a range or something. It would do me no good to know that Tamox lowers IFG if it turns out to be an insignificant amount. Does anyone maybe have personal experiences?