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Enclomiphene is a SERM that blocks estrogen receptors in the hypothalamus and pituitary, triggering increased LH and FSH secretion — which stimulates the testes to produce more testosterone naturally, without suppressing the HPG axis.
Enclomiphene is not FDA-approved in the US. Compounding pharmacies are the only legal domestic source. It is the preferred isomer of clomiphene as it avoids the estrogenic side effects of zuclomiphene found in Clomid.
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Enclomiphene citrate is the trans-isomer of clomiphene, isolated to deliver testosterone stimulation without the estrogenic side effects of the cis-isomer (zuclomiphene) found in Clomid.
As a SERM, enclomiphene blocks estrogen receptors in the hypothalamus and pituitary, removing estrogen's negative feedback on the HPG axis and causing a rise in LH and FSH — which drives the testes to produce more testosterone naturally.
Unlike exogenous TRT, enclomiphene preserves testicular function, maintains sperm production, and keeps the HPG axis intact. It is particularly popular among men with secondary hypogonadism who want to optimize testosterone while preserving fertility.
HPG Axis Stimulation
Enclomiphene blocks hypothalamic and pituitary estrogen receptors, preventing negative feedback inhibition and causing compensatory rises in LH and FSH.
Testicular Testosterone Production
Elevated LH stimulates Leydig cell testosterone synthesis. Elevated FSH supports spermatogenesis — preserving fertility unlike TRT.
Advantage Over Clomid
Pure enclomiphene eliminates zuclomiphene's estrogenic activity and long half-life, producing a cleaner androgenic response with fewer mood and vision side effects.
Secondary Hypogonadism: Low testosterone due to HPG axis dysfunction
Fertility Preservation: Men wanting testosterone optimization without TRT-induced infertility
TRT Alternative: Younger men or those planning families
Post-TRT Recovery: Restart of natural testosterone production after TRT discontinuation
Standard dose: 12.5–25mg once daily orally
Labs at 6–8 weeks: Total T, free T, LH, FSH, estradiol to assess response
Common (much less than Clomid):
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