Gonadorelin (2mg Vial) Dosage Protocol
Synthetic GnRH that stimulates LH/FSH release — research/educational dosing reference.
Pre-filled with this protocol’s recommended BAC water and documented starting dose — edit any field to run your own numbers. Reconstitution math only — not dosing advice. U-100 syringe: 100 units = 1 mL. Full reconstitution guide → · Advanced calculator →Mix & measure Gonadorelin · 2 mg
Dosing & Reconstitution Guide
A single practical dilution with accurate once-daily dosing, step by step
Standard / Gradual Approach (2 mL = 1.0 mg/mL)
Reconstitute: Add 2.0 mL bacteriostatic water to one 2 mg vial → final concentration 1.0 mg/mL (1,000 mcg/mL).
Typical daily range: 100–250 mcg once daily, raised gradually over an 8–12 week course.
Easy measuring: At 1.0 mg/mL, 1 unit = 10 mcg (0.01 mL) on a U-100 syringe, so doses fall on round, easy-to-read marks (100 mcg = 10 units, 250 mcg = 25 units).
Storage: Lyophilized: refrigerate at 2–8 °C (36–46 °F) or −20 °C long-term; after reconstitution, refrigerate at 2–8 °C and do not freeze the mixed solution.
Why Gonadorelin draws research interest
These are the directions researchers and the peptide community most often explore Gonadorelin for — so you know you’re in the right place. They describe what is being studied, not proven benefits, approved uses, or promised results.
Testosterone & testicular support
Explored in research on maintaining testicular function by prompting the pituitary to release LH and FSH.
Fertility research
Investigated for stimulating gonadotropin release; FDA-approved (Lutrepulse) for primary hypothalamic amenorrhea via pulsatile delivery.
HPG axis signaling
Studied as a synthetic GnRH analog for how LH/FSH pulses regulate the hypothalamic-pituitary-gonadal axis.
Pituitary function testing
FDA-approved (Factrel) as a diagnostic agent researched to assess pituitary gonadotropin reserve and response.
Evidence ranges from early laboratory work to clinical trials depending on the use — the sections below cover the actual data and sources.
Quickstart Highlights
Gonadorelin is a synthetic form of gonadotropin-releasing hormone (GnRH), the decapeptide that signals the pituitary to release luteinizing hormone (LH) and follicle-stimulating hormone (FSH)[1][5]. This educational page outlines a once-daily subcutaneous approach with a dilution chosen so doses land on easy-to-read insulin-syringe marks. Gonadorelin was historically FDA-approved (e.g. Factrel for diagnostic pituitary testing and Lutrepulse/Lutrelef by pulsatile pump for hypothalamic amenorrhea), but those branded products are largely discontinued; today it is mainly supplied as a compounded preparation, and community use for fertility and HPG-axis support is off-label — presented for research and educational use only.
Add 2.0 mL bacteriostatic water to one 2 mg vial → 1.0 mg/mL (1,000 mcg/mL), a practical dilution for accurate dosing.
100–250 mcg once daily, titrated upward gradually across an 8–12 week course.
At 1.0 mg/mL, 1 unit = 10 mcg (0.01 mL); 100 mcg = 10 units and 250 mcg = 25 units on a U-100 syringe.
Lyophilized: refrigerate at 2–8 °C (36–46 °F) or −20 °C (−4 °F) long-term; once reconstituted, refrigerate at 2–8 °C and do not freeze the solution.
Important: Start with the Prep & Injection Guide — it covers the preparation and safety basics every protocol on this site assumes.
Frequency: one subcutaneous injection each day, titrating up as tolerated. This once-daily schedule is intended to approximate the physiological total daily GnRH exposure, in line with commonly cited reference schedules[3][4]. These figures come from reference protocols, not from approved human dosing.
Reconstitution Steps
Draw 2.0 mL of bacteriostatic water into a sterile syringe.
Release it slowly down the vial’s inner wall to limit foaming.
Swirl or roll gently until fully dissolved — don’t shake.
Label with the date and concentration, then refrigerate at 2–8 °C (35.6–46.4 °F), shielded from light.
The 2.0 mL dilution gives a clean 1.0 mg/mL concentration where 1 unit equals 10 mcg, so every dose reads on a round U-100 mark. Avoid freezing the reconstituted solution, since freeze–thaw can denature the peptide.
Supplies Needed
Quantities below assume an 8–16 week course of once-daily injections with gradual titration.
Each 2 mg vial reconstituted at 1.0 mg/mL covers roughly 1–2 weeks depending on the titration step; plan accordingly.
- 8 weeks: ~5 vials
- 12 weeks: ~9 vials
- 16 weeks: ~12 vials
- Per injection: 1 syringe
- 8 weeks (once daily): ~56 syringes
- 16 weeks (once daily): ~112 syringes
Use 2.0 mL per 2 mg vial for reconstitution.
- 8 weeks (5 vials): ~10 mL → 1 bottle
- 16 weeks (12 vials): ~24 mL → 3 bottles
One for the vial stopper + one for the injection site each day.
- Per injection: 2 swabs
- 8 weeks (once daily): ~112 swabs → 1–2 boxes
Protocol Overview
A concise summary of the once-daily regimen, drawn from commonly cited reference protocols.
- ▪Goal: Support natural LH and FSH release to help maintain gonadal/testicular function (e.g. during testosterone replacement therapy)[5][6].
- ▪Schedule: Daily subcutaneous injections for 8–12 weeks, optionally extended to ~16 weeks.
- ▪Dose Range: 100–250 mcg per day with gradual titration.
- ▪Reconstitution: 2.0 mL bacteriostatic water per 2 mg vial gives 1.0 mg/mL for accurate unit measurements.
- ▪Storage: Keep the dry vial refrigerated at 2–8 °C (or frozen at −20 °C long-term); once mixed, refrigerate at 2–8 °C and do not freeze the solution.
Dosing Protocol
A suggested daily titration approach based on common reference doses.
- ▪Start: Begin at 100 mcg once daily for the first 2 weeks to gauge tolerability.
- ▪Titrate: Increase to 150 mcg (weeks 3–4), then 200 mcg (weeks 5–8) as tolerated.
- ▪Target: Reach about 200–250 mcg daily by weeks 9–12.
- ▪Cycle Length: Typically 8–12 weeks; optionally extended to ~16 weeks with medical guidance.
- ▪Timing: Inject at a consistent time each day and rotate injection sites systematically.
Storage Instructions
Correct storage is what preserves the peptide’s stability and activity.
- ▪Lyophilized: Hold the dry vial at 2–8 °C (36–46 °F), or −20 °C for long-term storage, in dry, dark conditions and limit moisture exposure[7].
- ▪Reconstituted: Refrigerate at 2–8 °C (36–46 °F) and use within about 30 days; do not freeze the mixed solution, as freezing can denature peptides[8].
- ▪Handling: Let frozen vials warm to room temperature before opening so condensation won’t form, and keep the solution clear of heat and direct light.
- ▪Freeze–thaw: Avoid repeated freeze–thaw cycles of the reconstituted solution.
Important Notes
Practical points that keep daily administration safe and consistent.
- ▪Sterile technique: Use a fresh sterile U-100 insulin syringe each time and drop it straight into a puncture-proof sharps container afterward.
- ▪Site rotation: Move between abdomen, thighs and upper arms to reduce local irritation and lipohypertrophy[9].
- ▪Slow injection: Push the plunger slowly and pause a few seconds before withdrawing the needle to prevent backflow.
- ▪Recordkeeping: Log the daily dose, injection site and any observations to keep the protocol consistent.
- ▪Regulatory note: Gonadorelin was historically FDA-approved (Factrel; Lutrepulse/Lutrelef), but those branded products are largely discontinued and it is now mainly a compounded preparation; community fertility/HPG-axis use is off-label[10].
How This Works
Gonadorelin is a synthetic form of gonadotropin-releasing hormone (GnRH) — a decapeptide identical to the hormone the hypothalamus releases in pulses[1][2]. That pulsatile GnRH signal is what drives normal reproductive hormone output.
Its core mechanism is stimulation of the anterior pituitary to release luteinizing hormone (LH) and follicle-stimulating hormone (FSH). In men whose endogenous GnRH/LH signalling is suppressed (for example on testosterone replacement therapy), gonadorelin can help restore that signalling pathway and maintain testicular function[5][6].
Clinical work has reported that pulsatile GnRH therapy can be superior to hCG for promoting testicular growth in hypogonadal patients[9]; practical once-daily dosing (100–250 mcg) is intended to approximate the total daily exposure achieved with more frequent pulsatile dosing[1].
Approval status: Gonadorelin was FDA-approved historically — as Factrel for diagnostic testing of pituitary gonadotropic function, and as Lutrepulse/Lutrelef delivered by pulsatile pump for hypothalamic amenorrhea. Those branded products are now largely discontinued, so gonadorelin is mainly available today as a compounded preparation. Its community use for fertility and HPG-axis support is off-label.
This page presents gonadorelin dosing for research and educational purposes only; it is not medical advice, and off-label use should be undertaken only under qualified medical supervision.
Lifestyle Factors
Complementary strategies that support hormonal health alongside the protocol.
- ▪Nutrition: Maintain a balanced diet with adequate protein, healthy fats and micronutrients to support hormone production.
- ▪Activity: Engage in regular resistance training and cardiovascular exercise to support metabolic and hormonal health.
- ▪Sleep: Aim for 7–9 hours of quality sleep per night for optimal hormonal balance.
- ▪Stress: Manage stress through mindfulness and recovery practices; avoid excess alcohol and endocrine disruptors.
Potential Benefits & Side Effects
What the clinical and research literature describe; individual responses vary and medical supervision is advised.
Potential Benefits
- ▪Gonadal support: Supports natural LH and FSH production to help maintain gonadal function during testosterone therapy[5][6].
- ▪Testicular function: May help preserve testicular size and function, with evidence of superior efficacy compared to hCG in adolescent hypogonadism[9].
- ▪Tolerability: Generally well tolerated, with occasional mild injection-site reactions (redness, itching).
- ▪Dosing note: Excessively high or frequent dosing can cause pituitary receptor downregulation and reduced effectiveness, so adherence to recommended ranges matters[2].
Common Side Effects
- ▪Injection-site reactions: Mild redness, tenderness or soreness can occur; rotating sites helps.
- ▪Hormonal effects: Because gonadorelin acts on the HPG axis, monitoring of hormone levels under medical guidance is advisable.
- ▪Off-label use: Branded gonadorelin products are largely discontinued; current use is typically compounded and off-label.
Injection Technique
General subcutaneous technique, following established clinical best-practice guidance[6][7].
Pre-Injection Preparation
- ▪Wash your hands well with soap and water.
- ▪Wipe the vial stopper with an alcohol swab and let it air-dry.
- ▪Choose a site (abdomen, thigh, or upper arm) and clean it with a fresh alcohol swab, letting it dry fully[7].
- ▪Draw the intended dose, then check for air bubbles and push any out.
Injection Procedure
- ▪Pinch a skinfold at the chosen site between thumb and forefinger.
- ▪Insert the needle into the pinch at a 45–90-degree angle (use 45 degrees if the fat layer is thin)[6].
- ▪Skip aspiration for subcutaneous shots — it isn’t needed[6].
- ▪Press the plunger slowly and steadily until it’s fully down.
- ▪Wait 5–10 seconds, then pull the needle straight out to prevent leakage.
Post-Injection Care
- ▪Drop the used syringe straight into a puncture-proof sharps container — never recap a needle.
- ▪Return the reconstituted vial to the fridge right away.
- ▪Rotate the injection site each day to prevent irritation and lipohypertrophy[9].
- ▪Watch the site for excess redness, swelling, or signs of infection.
Recommended Source
For high-purity research peptides, we point researchers to Prime Lab Peptides for Gonadorelin (2 mg).
Why Prime Lab Peptides?
- ▪Top-rated on Trustpilot: Independently reviewed as the highest-rated peptide lab on Trustpilot — making it the best current source in the USA.
- ▪Third-party tested: Every batch ships with a Certificate of Analysis (COA) confirming purity and composition.
- ▪Consistent quality: ISO-aligned manufacturing and handling keep product integrity reliable batch to batch.
- ▪Cold-chain integrity: Temperature-controlled shipping and storage across the whole fulfilment chain.
- ▪Research-grade purity: Fit for educational and research use that demands high-quality peptides.
Note: Product availability and specifications subject to change. Verify current product details on supplier website.
References
- 1
Drugs.com (AHFS/Micromedex)Gonadorelin injectable usage and dosing information (clinical reference).
- 2
Medicina (MDPI) 2024Management of male fertility in hypogonadal patients on testosterone replacement therapy.
- 3
Int J Fertil 1990 (PubMed)Stability and purity profile of gonadorelin acetate (high-purity GnRH).
- 4
Health CanadaLutrepulse (gonadorelin acetate) product monograph and storage guidance.
- 5
Rosemont Specialty Pharmacy 2021Fertility medications and storage information (gonadorelin and related peptides).
- 6
Immunize.org (IAC/CDC)How to administer intramuscular and subcutaneous injections (technique guide).
- 7
NCBI BookshelfAdministration of parenteral medications: subcutaneous technique and peptide handling.
- 8
Elsevier Clinical SkillsMedication administration: subcutaneous injections (home health care guide).
- 9
J. Clin. Endocrinol. Metab. 2015Pulsatile GnRH is superior to hCG in adolescent boys with hypogonadotropic hypogonadism.
- 10
Prime Lab PeptidesGonadorelin (2 mg) research peptide — purity specifications and certificates of analysis.
Gonadorelin — frequently asked questions
What are the mixing instructions for a 2 mg Gonadorelin vial?
Documented research protocols add 2 mL of bacteriostatic water to the 2 mg vial, giving 1.0 mg/mL (1,000 mcg/mL). On a U-100 syringe 1 unit then holds 10 mcg, so 100 mcg is 10 units, 150 mcg is 15 units, 200 mcg is 20 units and 250 mcg is 25 units.
Does Gonadorelin need to be refrigerated?
Yes. The lyophilized vial is held at 2-8 C (36-46 F), or -20 C for long-term storage, in dry dark conditions. Once reconstituted the solution is refrigerated at 2-8 C and used within about 30 days; it is not frozen, since freeze-thaw can denature the peptide.
How do I reconstitute a 2 mg vial of Gonadorelin?
Wipe the stopper with an alcohol swab, then inject your bacteriostatic water slowly down the inside wall of the vial. Let it sit and gently swirl until dissolved — never shake. Store the mixed vial in the refrigerator and draw doses with an insulin syringe. Use the calculator above to turn any dose into syringe units.
How much bacteriostatic water should I add to Gonadorelin?
There is no single correct amount — more water simply spreads the same 2 mg of peptide across a larger volume, which makes small doses easier to measure accurately. 1 to 3 mL per vial is typical. Enter your chosen volume in the calculator above to see the resulting concentration and syringe units.
What do the "units" on an insulin syringe mean?
On a U-100 insulin syringe, 100 units equal 1 mL, so 1 unit equals 0.01 mL. The calculator above converts your draw volume into these units automatically so you can measure without doing the math by hand.
How should I store Gonadorelin after mixing?
Keep the reconstituted vial refrigerated at roughly 2 to 8 degrees Celsius, away from light, and avoid freezing it. Reconstituted research peptides are generally used within a few weeks. Always follow the specific guidance supplied with your product.
How many doses does a 2 mg vial of Gonadorelin provide?
Divide the vial strength of 2 mg by the amount you use per injection. The calculator above reports this as "doses per vial" the moment you enter a dose.
Is Gonadorelin approved for human use?
No. Gonadorelin is sold strictly for laboratory and research purposes and is not approved by the FDA or other regulators for human use. Everything on this page is research information, not medical advice — consult a licensed healthcare professional before any use.
New protocols & dosing updates
Reconstitution charts, new peptide protocols and safety updates — straight to your inbox. No spam, unsubscribe anytime.