Head to head
Enclomiphene against HCG
Two ways to raise testosterone without replacing it, one oral and acting at the pituitary, one injected and acting at the testis. HCG is approved; enclomiphene is not, and is supplied through compounding.
Column A
EnclomipheneEnclomiphene citrate
The trans isomer of clomiphene, prescribed off-label through compounding to raise testosterone while preserving sperm production; never FDA-approved on its own after repeated complete response letters.
Column B
HCGHuman Chorionic Gonadotropin
An FDA-approved gonadotropin used in fertility and to maintain testicular function and testosterone production in men.
Side by side, on the facts we can check
| Attribute | Enclomiphene | HCG |
|---|---|---|
| Category | Hormone | Hormone |
| FDA status | Not FDA-approved (complete response letters); available as a compounded prescription | FDA-approved for fertility and hypogonadism (not for weight loss) |
| Half-life | Once-daily oral dosing | ~24-36 hours |
| Molecular weight | 406.0 Da | ~36,700 Da |
| Mechanism | Selective estrogen receptor antagonism at the hypothalamus, increasing GnRH, LH and FSH and therefore endogenous testosterone. | Activates LH receptors to stimulate testicular testosterone production and, in women, support ovulation and the corpus luteum. |
| Human studies cited | 1 | 2 |
| Legal status, US | Prescription via compounding pharmacies; not FDA-approved | FDA-approved, prescription only |
Frequently asked questions
What is the difference between Enclomiphene and HCG?
Enclomiphene: The trans isomer of clomiphene, prescribed off-label through compounding to raise testosterone while preserving sperm production; never FDA-approved on its own after repeated complete response letters. HCG: An FDA-approved gonadotropin used in fertility and to maintain testicular function and testosterone production in men.
Which has stronger research evidence, Enclomiphene or HCG?
This database does not grade compounds. It counts what was run in people: 1 of the 2 studies cited on the Enclomiphene profile were human work, against 2 of 4 for HCG. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are Enclomiphene and HCG FDA-approved?
Enclomiphene: Not FDA-approved (complete response letters); available as a compounded prescription. HCG: FDA-approved for fertility and hypogonadism (not for weight loss).
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.