HCG

Keeps natural testosterone and fertility online, the classic LH mimetic.

Keeps the testes switched on, natural testosterone production from the inside, not a shutdown
Mimics LH directly at Leydig cells; carries real FDA labeling (Pregnyl, Novarel) for male hypogonadism
The classic tool for preserving fertility and testicular function on TRT

Studied for

Intratesticular testosteroneFertility preservation

≥99% purity HPLC-tested Sexual & Hormonal

$109per vial

Free shipping over $200 · ships from the USA

Why researchers choose it

HCG mimics the body's own luteinizing hormone, so the testes keep making testosterone themselves instead of relying on an outside source. That makes it the standard tool for studying how fertility and testicular function hold up during testosterone therapy, and in women it's the standard ovulation trigger. It's a licensed medicine, not a research novelty.

How much, and how many vials for a full cycle?

Protocol and cycle-length questions get answered in the Complete Peptide Guide, not here. These listings carry no dosing.

This compound is supplied for laboratory research use only and is not for human or veterinary consumption. The research summarized here describes published third-party findings, not outcomes from Limitless Peptides, and is not dosing guidance or medical advice. These statements have not been evaluated by the Food and Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease.

How to verify what you received

Every batch we list is third-party HPLC-tested to ≥99% purity. When your vial arrives, these are the handling and quality-control checks a researcher runs before use.

Appearance
A uniform white to off-white lyophilized cake or powder with a consistent fill. Copper peptides carry a characteristic blue tint.
Purity documentation
Our material is third-party HPLC-verified to ≥99% purity and identity before it is listed.
Sealed packaging
An intact flip-top seal and rubber stopper, with the compound and batch clearly labeled.
Clean reconstitution
Dissolves into a clear, particulate-free solution once bacteriostatic water is added.

Commonly studied alongside

Kisspeptin-10(10 mg)

Kickstarts your body's own testosterone cascade, upstream of LH and FSH.

$62

What the research reports 5 citations

Mimics LH at LH/CG receptors on Leydig cells, so testosterone production comes from the testes rather than an outside source.Coviello 2005
Carries genuine FDA labeling: Pregnyl and Novarel are labeled for male hypogonadism.FDA labels (Pregnyl/Novarel)
In female physiology it stands in for the LH surge, serving as ovulation trigger and luteal support.rxlist (Pregnyl monograph)
Central research question is preserving intratesticular testosterone and fertility while an exogenous androgen suppresses the axis.Coviello 2005
Fertility endpoints read out slowly: one full spermatogenesis cycle runs 70-plus days before semen analysis shifts.Complete Peptide Guide

Compound reference physicochemical facts

Class: Glycoprotein hormone (biologic)
Storage: Lyophilized −20 °C; reconstituted 2–8 °C, kept from light

HCG$109

HCG

Why researchers choose it

How to verify what you received

Commonly studied alongside

Kisspeptin-10(10 mg)

More in Sexual & Hormonal

Kisspeptin-10(10 mg)

Melanotan I(10 mg)

Melanotan II(10 mg)

PT-141(10 mg)

What the research reports 5 citations

Compound reference physicochemical facts