Now, as if all of this werent enough, lets talk about how Proviron affects your HPTA (Hypothalamic-Pituitary-Testicular-Axis)& the thing that regulates the male hormonal system. When a reasonable dose of this stuff is given (100-150mgs/day), it had no depressing effect on low or normal serum FSH and LH levels (6). Follicle Stimulating Hormone (FSH) and Leutenizing Hormone (LH) are two hormones which send a signal to your testes to produce testosterone. Good news for people considering it for PCT is that it can even raise your LH (10)! Thus, by not suppressing those hormones and maybe even raising some, your normal testosterone levels will remain intact. This points to a novel use for this compound during Post-Cycyle-Therapy for a non-suppressive "bridge" between cycles. In fact, in yet another study, administration of Proviron (basically the same dose as in the last study) produced no changes in steroids, thyroid hormones, gonadotropins nor PRL (Prolactin Levels& you want those to remain low). (8).