EXACLTY! So this is my point, if Tren doesn't aromatize then how does PRL go up? Obviously they are taking another aromatizing compound. Because if Tren doesn't convert then it cannot directly or indirectly stimulate PRL.
SO thats what I am saying it is nothing like nandrolone.
Yes, it's due to an aromatizing agent being present MOST of the time.
SO let's start with the pieces and see if I can't put this together to help understand how this works a bit better.
For starters, prolactin is a hormone that is primarily controlled by one other hormone - dopamine. I'll link the educational paper in a minute as it becomes more relevant to the quotes below:
Decreased dopamine or PIF release or transport or interference with dopamine binding. Commonly used drugs such as phenothiazines, tranquilizers, opiates (B enkephalin and morphine), reserpine derivatives, amphetamines, estrogens (BCP) can interfere with dopamine metabolism and result in galactorrhea. Numerous drugs interfere with dopamine secretion (Table 1). The same principles utilized in the management of pituitary microadenomas or hyperplasia can be applied in these situations. If discontinuation of the drugs is feasible, resolution of hyperprolactinemia is uniformly prompt. Stress, trauma, surgery, and marathon running can reduce hypothalamic dopamine release. Galactorrhea can also occur after pituitary stalk section or with a hypothalamic or pituitary condition blocking dopamine transport (Tables 1 and 2).
This snippet also lends credence to how the well known issue with tren decreasing thyroid may also play a role..
Elevated TRH, which acts as an enhancer of prolactin release. TSH is the most sensitive method to evaluate for hypothyroidism. Occasionally, patients with hypothyroidism exhibit hyperprolactinemia with remarkable pituitary enlargement due to thyrotroph hyperplasia. These patients respond to thyroid replacement with reduction in pituitary enlargement and normalization of prolactin levels (34).
The bolded establishes WHY prolactin elevates; now I just need to tie in how prolactin becomes such an issue while on a progestin (19-nors). While tren and deca act slightly different, it should be noted that deca (as an aromatizing agent) has the ability to increase prolactin by itself, without any help.
Source.
Next, we need to define exactly what progestins are. We read about them all the time, and know that tren/nandrolone belong to this class of hormones - but I think the community could use a definition.
Progestins are synthetic progestogens that have progestogenic effects similar to those of progesterone. The two most common uses of progestins are for hormonal contraception (either alone or with an estrogen), and to prevent endometrial hyperplasia from unopposed estrogen in hormone replacement therapy.
Forgive the use of
Wikipedia, but it was an easy reference to cite.
So, we've established that estradiol and decreased thyroid output can diminish dopamine - which is an antagonist to prolactin. Now how does progesterone (or more specifically progesterone mimetics) play into this?
This is where it gets interesting. According to this study (animals, but mammals, and I'll look for a better one in a minute) BOTH estradiol AND progesterone are needed to significantly induce prolactin response.
E alone had little effect on serum prolactin levels, but E+P significantly increased prolactin as compared with ovariectomized controls. The BE levels increased with E treatment and remained elevated with E+P treatment in MBH and POA. The BE content was stimulated in DMH and MB by E+P treatment and not with E alone.
Source
This next quote adds information that I was unaware of, but I feel is relevant:
As a matter of fact, one study conducted on female lambs involved the administration of Trenbolone along with Estradiol (E2) and another group of lambs with Estradiol-only, which resulted in the expected effect of Prolactin increases as a result of Estradiol, but the Trenbolone + E2 group experienced an anti-Estrogen effect from Trenbolone, preventing the mammary stimulus of Estrogen[1]. This is hardly surprising, considering it is common knowledge that androgens can and do decrease the number of Prolactin receptors in the body as well[2] (especially strong androgens such as Trenbolone).
So tren being such a powerful androgen works against us? Whoa.
Source
Another effect that plays into this is how progestins can actually INCREASE the sensitivity of estrogen receptors. Oddly, this is something that progesterone itself doesn't do, but as progestins are structurally different, it's an unwanted effect as they're derivatives.
Bleh, I was digging for a good link to substantiate the last paragraph, but I'm being told by the warden... Errrrrrrrrr.. wife, that it's dinner time. Hopefully that's enough to draw some solid connections and shed some light on the topic at hand.