Gonadorelin: the complete guide
Gonadorelin is a synthetic form of endogenous GnRH. It is used in TRT protocols as an HCG alternative to maintain testicular function and preserve fertility.
How Gonadorelin works
Gonadorelin binds GnRH receptors on the anterior pituitary, stimulating pulsatile LH and FSH release which then drives testicular or ovarian function.
Typical Gonadorelin dosage
Commonly reported research ranges: 100–200 mcg per injection, often 2x daily or via pulsatile pump.
Dose should always be individualized. Factors that influence it include bodyweight, research goal, tolerance, and specific compound batch. The information below is educational, not a prescription.
How to reconstitute Gonadorelin
A widely used reconstitution for a 1 mg vial is 2 ml of bacteriostatic water. With a typical 100 mcg dose this works out to the unit count shown in the calculator below.
Half-life and administration frequency
2–10 minutes (very short).
This half-life informs how often Gonadorelin is typically dosed. Shorter half-lives usually mean more frequent dosing to maintain plasma levels; longer half-lives allow daily, weekly, or less-frequent administration depending on the compound.
Reported side effects
- Headache
- Injection-site reactions
- Nausea
- Hot flashes
- Theoretical desensitization with non-pulsatile dosing
This list reflects effects reported in available literature or user logs. It is not exhaustive. Adverse reactions should be discussed with a qualified clinician.
Common Gonadorelin stacks
- Paired with testosterone in TRT as an HCG alternative
Storage and handling
Lyophilized refrigerated. Reconstituted: refrigerated, use within 14 days.
FDA and regulatory status
FDA approved historically for diagnosis of hypothalamic-pituitary dysfunction (Factrel, Lutrepulse — discontinued commercially). Compounded for off-label TRT-support use.
Gonadorelin clinical trials and evidence
For clinical-trial and primary-literature context, start with the sources below. We prioritize official drug labels, ClinicalTrials.gov records, and PubMed-indexed literature when available.
- Gonadorelin clinical trial records — ClinicalTrials.gov
Track your Gonadorelin protocol on iPhone
Peptide Protocol logs every dose, calculates reconstitution for you, and keeps your full protocol on one calm screen.
See the app →Frequently asked questions
What is Gonadorelin?
Gonadorelin is a synthetic form of endogenous GnRH. It is used in TRT protocols as an HCG alternative to maintain testicular function and preserve fertility.
How does Gonadorelin work?
Gonadorelin binds GnRH receptors on the anterior pituitary, stimulating pulsatile LH and FSH release which then drives testicular or ovarian function.
What is a typical Gonadorelin dose?
Commonly reported ranges are 100–200 mcg per injection, often 2x daily or via pulsatile pump. This is research information, not a recommendation — dosing should be individualized under clinical guidance.
What is the half-life of Gonadorelin?
2–10 minutes (very short). This influences how often it is administered.
How do you reconstitute Gonadorelin?
A common approach is to add 2 ml of bacteriostatic water to a 1 mg vial. Use the reconstitution calculator for exact unit counts.
What are the side effects of Gonadorelin?
Headache; Injection-site reactions; Nausea; Hot flashes; Theoretical desensitization with non-pulsatile dosing.
Is Gonadorelin FDA approved?
FDA approved historically for diagnosis of hypothalamic-pituitary dysfunction (Factrel, Lutrepulse — discontinued commercially). Compounded for off-label TRT-support use.
Are there clinical trials for Gonadorelin?
Registered or published clinical-trial sources for Gonadorelin are listed in the references section below. Evidence depth varies widely by compound, so check the cited trial registries and primary literature before relying on any claim.
References
- Gonadorelin / GnRH — FDA Drugs@FDA — U.S. Food and Drug Administration. Historical US approvals for diagnostic GnRH use; marketing status varies
- Gonadorelin pharmacology literature — PubMed. Primary research on native GnRH and pulsatile dosing
- Gonadorelin clinical trial records — ClinicalTrials.gov. Registered human studies
Sources listed above were used to verify the claims on this page. See our editorial policy for how we source information.
Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.