GHRP-2 (10mg Vial) Dosage Protocol
Ghrelin-receptor GH secretagogue — research/educational dosing reference.
Mix & measure GHRP-2 · 10 mg
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 →
Quickstart Highlights
GHRP-2 (Growth Hormone-Releasing Peptide-2) is a synthetic hexapeptide that acts as a ghrelin / GHS-R1a receptor agonist, prompting the pituitary to release a dose-dependent pulse of growth hormone[1][2]. Unlike the more selective ipamorelin, it also modestly raises cortisol and prolactin, and it is often stacked with a GHRH analog such as CJC-1295. This educational page outlines a once-daily subcutaneous approach dosed in micrograms with a dilution chosen so doses land on easy-to-read insulin-syringe marks. It is an unapproved research chemical — not FDA-approved for any human use, WADA-prohibited, and its anti-aging or body-composition benefit claims are not established by rigorous human outcome trials — presented for research and educational use only.
Add 3.0 mL bacteriostatic water to one 10 mg vial → ~3.33 mg/mL (3,333 mcg/mL), the largest practical dilution for accurate dosing.
100–300 mcg once daily, titrated upward gradually across an 8–16 week course (about ~1.4 mg per week on average).
At ~3.33 mg/mL, 1 unit ≈ 33.3 mcg; 100 mcg ≈ 3 units and 300 mcg ≈ 9 units on a U-100 syringe.
Lyophilized: store at −20 °C (−4 °F); once reconstituted, refrigerate at 2–8 °C (35.6–46.4 °F) 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.
Dosing & Reconstitution Guide
A single practical dilution with accurate once-daily dosing, step by step
Standard / Gradual Approach (3 mL = ~3.33 mg/mL)
Reconstitute: Add 3.0 mL bacteriostatic water to one 10 mg vial → final concentration ~3.33 mg/mL (3,333 mcg/mL).
Typical daily range: 100–300 mcg once daily on an empty stomach, raised gradually over an 8–16 week course.
Easy measuring: At ~3.33 mg/mL, 1 unit ≈ 33.3 mcg on a U-100 syringe. For small ≤10-unit volumes, a 30- or 50-unit insulin syringe improves readability.
Storage: Lyophilized: store at −20 °C (−4 °F); after reconstitution, refrigerate at 2–8 °C (35.6–46.4 °F) and do not freeze the mixed solution.
Frequency: one subcutaneous injection each day on an empty stomach (roughly 20–30 minutes before or after food, since carbohydrate and fat blunt the GH pulse), titrating up as tolerated. Once-daily dosing balances efficacy with receptor recovery, avoiding the tachyphylaxis seen with very frequent administration[3]; evening dosing may align with nocturnal GH rhythms[4]. These figures come from reference protocols, not from approved human dosing.
Reconstitution Steps
Draw 3.0 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 3.0 mL dilution is deliberately large so each dose reads at 30 units or more, where U-100 syringe markings are most precise. Avoid freezing the reconstituted solution, since freeze–thaw can denature the peptide.
Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.
Supplies Needed
Quantities below assume an 8–16 week course of once-daily injections with gradual titration. At microgram doses a single 10 mg vial lasts well over a week, so far fewer vials are needed.
A 10 mg vial covers roughly four weeks at these microgram doses, so only a few vials are needed per cycle.
- 8 weeks: ~1 vial
- 12 weeks: ~2 vials
- 16 weeks: ~3 vials
- Per injection: 1 syringe
- 8 weeks (once daily): ~56 syringes
- 16 weeks (once daily): ~112 syringes
Use ~3.0 mL per 10 mg vial for reconstitution.
- 8 weeks (2 vials): ~6 mL → 1 bottle
- 16 weeks (5 vials): ~15 mL → 2 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: Stimulate endogenous, pulsatile growth-hormone secretion through ghrelin / GHS-R1a receptor activation[1]. GH/IGF-1-raising effects are documented; downstream anti-aging or body-composition benefits are not established in humans.
- ▪Schedule: Daily subcutaneous injections on an empty stomach for 8–12 weeks, optionally extended to ~16 weeks for longer research goals.
- ▪Dose Range: 100–300 mcg per day with gradual titration; higher doses are dose-dependent but may add little with routine use[4].
- ▪Reconstitution: 3.0 mL bacteriostatic water per 10 mg vial gives ~3.33 mg/mL for accurate unit measurements.
- ▪Storage: Keep the dry vial frozen at −20 °C (−4 °F); 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 (Weeks 1–2) to gauge tolerability while still eliciting a strong GH pulse.
- ▪Titrate: Move to 150 mcg daily (Weeks 3–4), then 200 mcg (Weeks 5+) as tolerated.
- ▪Target: Reach about 200 mcg daily by weeks 5–16; advanced researchers may optionally use 250–300 mcg.
- ▪Cycle Length: Typically 8–12 weeks; some references extend to ~16 weeks.
- ▪Timing: Inject on an empty stomach at a consistent time each day (evening may suit nocturnal GH rhythms) and rotate injection sites systematically.
Storage Instructions
Correct storage is what preserves the peptide’s stability and activity.
- ▪Lyophilized: Hold the dry vial at −20 °C (−4 °F) in dry, dark conditions and limit moisture exposure[7].
- ▪Reconstituted: Refrigerate at 2–8 °C (35.6–46.4 °F) and use within about 28 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].
- ▪Avoid over-frequent dosing: Very frequent administration (e.g., every few hours) causes progressive attenuation (tachyphylaxis); once-daily dosing avoids this[3].
- ▪Recordkeeping: Log the daily dose, injection site and any observations to keep the protocol consistent.
- ▪Regulatory note: GHRP-2 is prohibited by WADA for athletic use and is not FDA-approved for any human administration[10].
How This Works
GHRP-2 is a synthetic hexapeptide growth-hormone secretagogue. It binds and activates the ghrelin receptor (GHS-R1a) on the pituitary and hypothalamus[1][2], mimicking the natural hormone ghrelin.
Receptor activation triggers a potent, dose-dependent pulse of growth hormone from the pituitary[4]. Unlike the highly selective ipamorelin, GHRP-2 also modestly raises cortisol and prolactin and can stimulate appetite via ghrelin signalling. It is frequently stacked with a GHRH analog such as CJC-1295, which acts on a separate receptor for an additive GH response.
Clinical studies in GH-deficient children showed meaningful GH increases even at low doses, and in healthy adults ~100 mcg SC daily produces acute GH stimulation[2][3]. Frequency matters: very frequent dosing causes acute tachyphylaxis, so once-daily schedules are used to preserve receptor sensitivity.
Important caveat: while GHRP-2’s effect on GH and IGF-1 is well documented, the downstream anti-aging, fat-loss and muscle-building benefits often attributed to it are not established by rigorous human outcome trials. Raising GH/IGF-1 is not the same as proven clinical benefit, and the long-term safety of chronic use in healthy adults is unknown. Such claims should be read as hypotheses.
GHRP-2 is not an approved medicine. It is an unapproved research chemical — not FDA-approved for any human use and prohibited by WADA — presented here for research and educational purposes only.
Lifestyle Factors
Habits that may complement elevated GH alongside the protocol.
- ▪Nutrition: Keep protein intake adequate to support the anabolic effects of elevated GH; dose on an empty stomach.
- ▪Activity & rest: Pair resistance training with real recovery time to support body-composition goals.
- ▪Sleep: Aim for 7–9 hours to support the body’s natural repair processes.
- ▪Stress: Manage stress with evidence-based practices, since it influences overall healing.
Potential Benefits & Side Effects
What clinical and preclinical literature describe; downstream benefits are not established and individual results vary.
Potential Benefits
- ▪GH/IGF-1 elevation (documented): Produces robust pulsatile GH release; combined with a GHRH analog it can meaningfully raise IGF-1[5][6].
- ▪Body-composition (hypothesised): GH elevation is sometimes claimed to support fat loss and lean mass, but these outcomes are not established in rigorous human trials.
- ▪Tolerability: Generally well tolerated in clinical trials at these dose ranges, with a largely placebo-like profile[7].
- ▪Note: GHRP-2 is an unapproved research chemical; anti-aging and body-composition benefit claims are not established by rigorous human outcome trials.
Common Side Effects
- ▪Hunger, cortisol & prolactin: Transient hunger or flushing can occur; GHRP-2 modestly raises cortisol and prolactin (more so than ipamorelin)[7].
- ▪Unknown long-term profile: Long-term safety of chronic use in healthy adults is unknown; caution and monitoring are advised.
- ▪Sport restriction: Note that GHRP-2 is a WADA-prohibited substance for athletes.
Injection Technique
General subcutaneous technique, following established clinical best-practice guidance[14][15].
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[15].
- ▪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)[14].
- ▪Skip aspiration for subcutaneous shots — it isn’t needed[14].
- ▪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 GHRP-2 (10 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
Domestic Animal EndocrinologyEffects of GHRP-2 on growth hormone release and growth performance, illustrating ghrelin-receptor activation.
- 2
J Clin Endocrinol MetabEight-month treatment with graded doses of GHRP-2 in GH-deficient children: sustained GH/IGF-1 response.
- 3
Eur J EndocrinolFive-day daily subcutaneous GHRP-2 in healthy young men: response attenuation and IGF-I effects.
- 4
EndocrineGH/IGF-1 response to acute and chronic GHRP-2, GHRH(1-44) and their combination in older adults.
- 5
American Journal of Men’s HealthGrowth-hormone secretagogue treatment in hypogonadal men raises serum IGF-1 levels.
- 6
Sexual Medicine Reviews (PMC)The safety and efficacy of growth-hormone secretagogues: a comprehensive review.
- 7
Genaxxon BioscienceProduct information: Growth Hormone-Releasing Peptide-2 (GHRP-2) technical specifications.
- 8
Peptide Storage GuideBest practices for storing lyophilized peptides (temperature, humidity and light protection).
- 9
NCBI BookshelfBest practices for subcutaneous injection: aseptic technique and site rotation.
- 10
WADA Prohibited ListClassification of GHRP-2 and growth-hormone secretagogues as prohibited in competitive sport.
- 11
Ghrelin Receptor (GHS-R1a) PharmacologyGhrelin / GHS-R1a receptor signalling and growth-hormone secretagogue mechanism of action.
- 12
Cortisol & Prolactin (GHRPs)GHRP-class peptides modestly raise cortisol and prolactin relative to selective secretagogues.
- 13
- 14
- 15
Subcutaneous Injection Technique (Patient Education)How to administer a subcutaneous injection: clinical technique guidelines.
How to reconstitute GHRP-2
- 1Wipe the vial stopper and your bacteriostatic-water vial with an alcohol swab.
- 2Draw your chosen amount of bacteriostatic water and inject it slowly down the inner wall of the GHRP-2 vial.
- 3Let it rest, then gently swirl until fully dissolved — do not shake.
- 4Refrigerate the reconstituted vial and draw each dose with a U-100 insulin syringe.
GHRP-2 — frequently asked questions
How do I reconstitute a 10 mg vial of GHRP-2?
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 GHRP-2?
There is no single correct amount — more water simply spreads the same 10 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 GHRP-2 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 10 mg vial of GHRP-2 provide?
Divide the vial strength of 10 mg by the amount you use per injection. The calculator above reports this as "doses per vial" the moment you enter a dose.
Is GHRP-2 approved for human use?
No. GHRP-2 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.
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