Enclomiphene
Enclomiphene Citrate — Selective Estrogen Receptor Modulator
What is Enclomiphene?
Enclomiphene is the trans-isomer of clomiphene citrate — the active isomer responsible for the testosterone-stimulating effects of Clomid. By isolating the enclomiphene isomer and eliminating the zuclomiphene isomer (which has weak estrogenic activity), enclomiphene provides a cleaner SERM effect: blocking estrogen receptors in the hypothalamus to increase LH, FSH, and endogenous testosterone without the estrogenic side effects associated with mixed clomiphene.
Enclomiphene blocks estrogen receptors in the hypothalamus, preventing estradiol from suppressing GnRH pulsatility. Without estrogen negative feedback, the hypothalamus increases GnRH output, which drives increased LH and FSH from the pituitary, which then stimulates Leydig cells to produce more testosterone. This preserves the entire HPG axis — unlike exogenous testosterone which suppresses it.
Research Evidence
Phase 2 and 3 trials demonstrate enclomiphene significantly increases total and free testosterone while maintaining LH, FSH, and sperm production — unlike exogenous TRT which suppresses all three.
Unlike TRT, enclomiphene stimulates endogenous testosterone production while maintaining or improving sperm counts. Strong option for hypogonadal men who want improved testosterone and preserved fertility.
Studies comparing enclomiphene to TRT show comparable testosterone elevation but with preserved fertility markers. Some men report inferior symptom relief vs injectable testosterone due to lower peak testosterone.
Evidence grades: Gold = RCT human data · Silver = consistent animal/human data · Bronze = limited or preliminary
Dosing Protocols
Reconstitution Guide
This compound does not require reconstitution — it is available as a pre-mixed injectable, oil-based solution, or oral formulation.
Frequently Asked Questions
Is enclomiphene better than Clomid?
Enclomiphene is the active isomer of Clomid (clomiphene). Clomid contains both enclomiphene (the beneficial testosterone-stimulating isomer) and zuclomiphene (which has weak estrogenic activity and a long half-life). By using pure enclomiphene, you get the testosterone-stimulating effects without the estrogenic and visual side effects commonly reported with Clomid. Most TRT specialists prefer enclomiphene over standard Clomid.
Can I use enclomiphene instead of TRT?
Yes, for mild to moderate hypogonadism, enclomiphene can raise testosterone to normal range while preserving fertility and testicular function. It is not suitable for men with primary hypogonadism (testicular failure) — in those cases the testes cannot respond to LH stimulation. For secondary hypogonadism (the more common type) with an intact hypothalamic-pituitary-testicular axis, enclomiphene is a viable TRT alternative.
References
- [1]Kim ED, McCullough A, Kaminetsky J. Oral enclomiphene citrate raises testosterone and preserves sperm counts in obese hypogonadal men, unlike topical testosterone. BJU Int. 2016;117(4):677-685.
- [2]Wiehle R, Cunningham GR, Pitteloud N, et al. Testosterone restoration by enclomiphene citrate in men with secondary hypogonadism: pharmacodynamics and pharmacokinetics. BJU Int. 2013;112(8):1188-1200.
This profile was prepared using AI-assisted research synthesis. Citations are provided where applicable — verify with primary sources before clinical application.
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