
Originally Posted by
Docd187123
I think I maybe wasn't explaining my position clearly. I'm not denying that receptor affinity or competition exists, I'm not denying one compound can have a higher binding rate or affinity than another, and I'm not denying that compound x may have reduced chance to bind than compound y bc y has a higher affinity. I agree with these points in theory or in periods of supersaturation.
Where I'm not following you is in this case how that applies to OP and if these issues will result in actual clinical manifestations. Let me try to better explain why I don't think it does.
If this is such an important issue why would you ever stack more than one compound at a time? Tren has a higher binding affinity to the androgen receptor than test. Following your line of thinking, to the extreme, you wouldn't need the test bc the tren will always win out. But we still take test with tren and even sometimes stack more compounds together with increased results in most cases. If as you say all AAS compete with each other, and I agree that they do, than with your train of thought what's the purpose of ever taking more than one AAS? The limiting factor here is diminishing returns not receptor binding affinities.
Another issue is that for this to be an issue here you'd have to assume several things:
1) AAS molecules bind permanently to the receptor but we know that's not the case. Nandrolone takes roughly 4-6hrs for the binding and transcription process and subsequent dissociation. After the hormone molecule leaves the cytosol both hormone and receptor are free to bind again...increasing the chances of the other hormone to eventually bind and activate the receptor. Nandrolone is one of the longest compounds in terms of time for the whole process from start to finish I believe.
2) receptor saturation: if this were the case I'd agree with you that it would be an important consideration regarding receptor affinity but we know again this isn't the case. If it were and all the receptors had bonded to a hormone molecule (here in OP's case of <1g of gear) than 800mg of test would not get you any bigger than 2g of test bc the receptors would have been saturated at much lower levels. 2g would certainly get you bigger or stronger albeit it with diminished returns.
3) there's enough evidence to safely assume that receptor down regulation doesn't happen from supraphysiological doses of AAS and there's enough to assume that in fact up regulation does happen with supraphysiological doses. This means if anything, more gear means more receptor sites in each cell cytosol meaning receptor competition would become less of a problem not more.
4) another possibility is assuming that AAS only works by direct activation of the androgen receptor. Once again we know that AAS can work through pathways outside of receptor activation. For instance the anti-glucocorticoid effects of AAS (anti-catabolism or anti-proteolysis). This indirect muscle building effect is not attributed to activation of the androgen receptor but the displacement of glucocorticoid from the glucocorticoid receptor which would signal the body to release stored protein. Another effect is saturation of skeletal muscle tissue with creatine phosphate. Elevated androgen levels, irrespective of the activation of their receptor, allows more creatine phosphate to be stored in skeletal muscle tissue. While obviously not a direct effect on muscle building, a more efficient anaerobic pathway means more efficient training means more muscle mass in the long run. Finally, AAS can increase IGF-1 levels, not all to the same degree, but again this is independent of activating the receptor.
Considering all the above that he hasn't saturated his androgen receptors, that androgen receptors can actually up regulate, that there are numerous indirect benefits for increased androgen levels (not activation), considering both receptor and hormone are allowed to bind more than once increasing the chance that the compound with weaker affinity will eventually bind to the AR, etc...should we even worry about receptor competition? I propose that we shouldn't for the above reasons.