Sermorelin (5mg Vial) Dosage Protocol
GHRH analog that stimulates the body's own GH — research/educational dosing reference.
Concerned about side effects? See Sermorelin side effects — what the research documents (honest, sourced, research-use-only).
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 Sermorelin · 5 mg
Dosing & Reconstitution Guide
A single practical dilution with accurate once-daily bedtime dosing, step by step
Standard / Gradual Approach (3 mL = ~1.67 mg/mL)
Reconstitute: Add 3.0 mL bacteriostatic water to one 5 mg vial → final concentration ~1.67 mg/mL (1,667 mcg/mL).
Typical nightly range: 100–500 mcg once daily at bedtime, raised gradually over an 8-week course.
Easy measuring: At ~1.67 mg/mL, 1 unit ≈ 16.7 mcg on a U-100 syringe. The 3.0 mL dilution keeps most doses near 12–30 units for good measuring accuracy.
Storage: Lyophilized: refrigerate at 2–8 °C (35.6–46.4 °F); after reconstitution, keep refrigerated at 2–8 °C, use within 10–14 days and do not freeze the mixed solution.
Why Sermorelin draws research interest
These are the directions researchers and the peptide community most often explore Sermorelin for — so you know you’re in the right place. They describe what is being studied, not proven benefits, approved uses, or promised results.
GH & IGF-1 support
Studied as a GHRH analog that prompts the pituitary to release the body's own GH; Sermorelin (Geref) was once FDA-approved for pediatric GH testing.
Age-related GH decline
Investigated in research on somatopause and adult growth hormone deficiency — investigational, not an approved anti-aging therapy.
Sleep architecture
Explored in research on slow-wave (deep) sleep, since GHRH signaling is linked to sleep patterns — preclinical and early-stage.
Body composition & fat metabolism
Researched for effects on lean mass and lipolysis via the GH/IGF-1 axis — investigational, animal and early human data only.
Evidence ranges from early laboratory work to clinical trials depending on the use — the sections below cover the actual data and sources.
Quickstart Highlights
Sermorelin is a GHRH analog — a synthetic copy of GHRH(1–29), the active fragment of growth-hormone-releasing hormone — that stimulates the pituitary to release the body’s own growth hormone (and, in turn, IGF-1)[1][6]. This educational page outlines a once-daily subcutaneous approach dosed in micrograms at bedtime, with a dilution chosen so doses land on easy-to-read insulin-syringe marks. Sermorelin was once FDA-approved (brand Geref) for childhood GH deficiency, but that product was discontinued around 2008 and no FDA-approved sermorelin exists today; adult uses are off-label/compounded or research-only and are not proven by rigorous trials — presented for research and educational use only.
Add 3.0 mL bacteriostatic water to one 5 mg vial → ~1.67 mg/mL (1,667 mcg/mL), the largest practical dilution for accurate microgram dosing.
100–500 mcg once daily at bedtime, titrated upward gradually toward ~500 mcg over an 8-week course.
At ~1.67 mg/mL, 1 unit ≈ 16.7 mcg; 200 mcg ≈ 12 units and 500 mcg ≈ 30 units on a U-100 syringe.
Lyophilized: refrigerate at 2–8 °C (35.6–46.4 °F); once reconstituted, keep refrigerated at 2–8 °C, use within 10–14 days 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 night at bedtime, titrating up by about 100 mcg every 1–2 weeks toward ~500 mcg as tolerated. Bedtime dosing is strongly preferred because endogenous GH secretion peaks during sleep, so the analog reinforces the natural nocturnal pulse[3]. To start lower, 100 mcg ≈ 6 units (0.06 mL). These figures come from reference protocols, not from approved adult 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 microgram dose reads at a comfortable number of units, where U-100 syringe markings are most precise. Avoid freezing the reconstituted solution, since freeze–thaw can denature the peptide.
Supplies Needed
Quantities below assume an 8–12 week course of once-daily bedtime injections with gradual titration.
Microgram dosing makes a 5 mg vial last several weeks; plan roughly one vial every ~2 weeks at mid-range doses.
- 8 weeks: ~4 vials (+1 backup)
- 12 weeks: ~6–7 vials
- Tip: keep 1 extra vial for spillage or loss
- Per injection: 1 syringe
- 8 weeks (once daily): ~56 syringes
- 12 weeks (once daily): ~84 syringes
Use ~3.0 mL per 5 mg vial for reconstitution. Contains benzyl alcohol preservative; do not use if allergic.
- 8 weeks (4 vials): ~12 mL → 2 bottles
- 12 weeks (7 vials): ~21 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 nightly regimen, drawn from commonly cited reference protocols.
- ▪Goal: Stimulate the body’s own pulsatile pituitary GH release to support physiologic IGF-1 levels — effects on adult body composition are modest and not established by rigorous trials[1][2].
- ▪Schedule: Daily subcutaneous injections at bedtime for 3–6 months in adult research use (pediatric GHD trials ran 6–12 months)[1].
- ▪Dose Range: 100–500 mcg nightly with gradual titration (adult research range; pediatric GHD used ~30 mcg/kg nightly)[2].
- ▪Reconstitution: 3.0 mL bacteriostatic water per 5 mg vial gives ~1.67 mg/mL for accurate unit measurements.
- ▪Storage: Keep the dry vial refrigerated at 2–8 °C (35.6–46.4 °F); once mixed, refrigerate, use within 10–14 days and do not freeze the solution.
Dosing Protocol
A suggested nightly titration approach for adult off-label research use.
- ▪Start: Begin at 100–200 mcg once nightly at bedtime to gauge tolerability.
- ▪Titrate: Increase by roughly 100 mcg every 1–2 weeks as tolerated.
- ▪Target: Reach about 300–500 mcg nightly by weeks 5–8, adjusting based on IGF-1 response.
- ▪Cycle Length: Typically 3–6 months for adult research use; pediatric GHD trials ran 6–12 months.
- ▪Timing: Inject at bedtime to leverage the natural nocturnal GH pulse, and rotate injection sites systematically.
Storage Instructions
Correct storage is what preserves the peptide’s stability and activity.
- ▪Lyophilized: Store the dry vial at 2–8 °C (35.6–46.4 °F) in dry, dark conditions; do not freeze the dry powder and check the expiration date[2].
- ▪Reconstituted: Refrigerate at 2–8 °C (35.6–46.4 °F) and use within about 10–14 days; do not freeze the mixed solution, as freezing can denature peptides[4].
- ▪Handling: Let the vial reach room temperature before reconstituting to aid dissolution, and inspect the solution before each use — it should be clear and colorless.
- ▪Aseptic technique: Swab the stopper with alcohol before each draw and use a new sterile needle and syringe per injection.
Important Notes
Practical points that keep daily administration safe and consistent.
- ▪Bedtime dosing is key: Sermorelin reinforces the natural nocturnal GH pulse, so administering before sleep is strongly recommended[3].
- ▪Site rotation: Move between abdomen, thighs and upper arms to reduce local irritation and lipohypertrophy[7].
- ▪Monitoring: Check IGF-1 at baseline and periodically (every 1–2 months) to confirm response, and assess thyroid function with long-term use, since subclinical hypothyroidism can blunt the GH response[5].
- ▪Recordkeeping: Log the nightly dose, time, injection site and any observations to keep the protocol consistent.
- ▪Regulatory note: The former FDA-approved sermorelin (Geref) was discontinued around 2008; there is no FDA-approved sermorelin today, and adult anti-aging use is off-label/compounded or research-only[2].
How This Works
Sermorelin is a GHRH analog — synthetic GHRH(1–29), the shortest active fragment of growth-hormone-releasing hormone. It binds and agonizes GHRH receptors on pituitary somatotropes, prompting the gland to release the body’s own growth hormone in natural pulses[1][6].
Unlike recombinant HGH, which replaces growth hormone directly, sermorelin works upstream and preserves normal somatostatin and IGF-1 negative feedback — the pituitary can still throttle output, which lowers the risk of supraphysiologic GH or IGF-1 levels[6]. Because it acts on the gland, sermorelin requires a functional pituitary and will not work where there is pituitary damage or a primary GH gene defect.
Its plasma half-life is short — about ~12 minutes — but the GH pulse it triggers lasts roughly 2–4 hours. That is why it is given once nightly: a bedtime dose reinforces the body’s natural nocturnal GH surge, and the resulting GH then drives hepatic and peripheral IGF-1 production[3].
Approval & evidence: Sermorelin was FDA-approved (brand Geref) for diagnosing and treating growth hormone deficiency in children, where nightly subcutaneous therapy improved height velocity over 6–12 months[1]. That product was discontinued around 2008 for commercial reasons, and there is no FDA-approved sermorelin today. Modern adult anti-aging, body-composition and sleep uses are off-label/compounded or research-only, extrapolated from pediatric and physiologic data and not proven by rigorous adult trials[2].
Sermorelin is presented here as an unapproved research chemical for research and educational purposes only.
Lifestyle Factors
Habits that may support the GH/IGF-1 response alongside the protocol.
- ▪Sleep quality: Prioritize 7–9 hours of uninterrupted sleep to maximize the natural nocturnal GH pulse the protocol relies on.
- ▪Nutrition: Keep protein intake adequate (about 1.6–2.2 g/kg/day); avoid large high-carbohydrate meals right before bedtime, which can blunt GH release.
- ▪Exercise: Combine resistance training with moderate aerobic activity to support the GH/IGF-1 effects on body composition.
- ▪Stress & substances: Manage stress (elevated cortisol suppresses GH) and limit alcohol and smoking, both of which can blunt the response.
Potential Benefits & Side Effects
Observations come mainly from pediatric trials and adult off-label research; adult efficacy evidence is limited and individual results vary.
Potential Benefits
- ▪Endogenous GH/IGF-1: Stimulates the body’s own pulsatile GH release, supporting physiologic IGF-1 elevation[1][2].
- ▪Pediatric GHD (approved use): Significant improvements in height velocity over 6–12 months of nightly therapy[1].
- ▪Adults (off-label): May support modest changes in body composition, energy and recovery — evidence is limited, and effects are smaller than direct GH therapy[6].
- ▪Preserved feedback: Built-in negative feedback reduces the risk of supraphysiologic GH/IGF-1 versus exogenous GH[6].
Common Side Effects
- ▪Injection-site reactions: Transient redness, pain or swelling (~17% in trials); rotating sites helps[5].
- ▪Rare systemic effects (<1%): Headache, flushing, dizziness, hyperactivity, drowsiness or hives[5].
- ▪Thyroid considerations: Subclinical hypothyroidism (~6.5% in one study) can blunt the GH response — monitor with long-term use[5].
- ▪Unknown long-term profile: Adult human safety data are limited, so caution and monitoring are advised.
Injection Technique
General subcutaneous technique, following established clinical best-practice guidance[7][8].
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 at least 2 inches from the navel, outer thigh, or upper arm) and clean it with a fresh alcohol swab, letting it dry fully[7].
- ▪Draw the intended nightly 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)[8].
- ▪Skip aspiration for subcutaneous shots — it isn’t needed[8].
- ▪Press the plunger slowly and steadily until it’s fully down.
- ▪Wait 1–2 seconds, then pull the needle straight out to prevent leakage.
Post-Injection Care
- ▪Apply gentle pressure with a cotton ball or alcohol pad — do not rub the site.
- ▪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[7].
Recommended Source
For high-purity research peptides, we point researchers to Prime Lab Peptides for Sermorelin (5 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
Prakash & Goa, Drugs (PubMed)Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic GH deficiency (~30 mcg/kg SC nightly; 6–12 month trials).
- 2
RxList — Sermorelin Acetate MonographAdult off-label dosing (~0.2–0.3 mg SC at bedtime), reconstitution, storage and administration; Geref discontinued (no current FDA-approved sermorelin).
- 3
Nocturnal GH Secretion (PubMed)Endogenous growth hormone secretion peaks during sleep, supporting bedtime administration of GHRH analogs.
- 4
Mayo Clinic — Sermorelin (Injection Route)Proper use and storage: refrigerate the reconstituted solution at 2–8 °C, do not freeze, and use within the recommended period.
- 5
RxList — Sermorelin Prescribing InformationAdverse effects: injection-site reactions (~17%); rare headache/flushing (<1%); subclinical hypothyroidism (~6.5%); thyroid monitoring recommended.
- 6
Sermorelin Mechanism (PubMed)GHRH analog stimulates endogenous pulsatile GH via pituitary GHRH receptors while preserving somatostatin/IGF-1 negative feedback, reducing overshoot risk vs. exogenous GH.
- 7
Johns Hopkins Arthritis CenterHow to give a subcutaneous injection: site selection (abdomen/thigh/arm), rotation, 45–90° angle, pinch technique, no aspiration, sharps disposal.
- 8
Centers for Disease Control and Prevention (CDC)Subcutaneous injection technique: 45–90° angle, site preparation and no-aspiration guidance.
- 9
Peptide Storage Guide (GenScript)Best practices for handling and storing peptides: temperature, humidity and light protection; avoid freeze–thaw of solutions.
- 10
Prime Lab PeptidesSermorelin (5 mg) product page — purity specifications and certificates of analysis.
Sermorelin — frequently asked questions
How do I reconstitute a 5 mg vial of Sermorelin?
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 Sermorelin?
There is no single correct amount — more water simply spreads the same 5 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 Sermorelin 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 5 mg vial of Sermorelin provide?
Divide the vial strength of 5 mg by the amount you use per injection. The calculator above reports this as "doses per vial" the moment you enter a dose.
Is Sermorelin approved for human use?
No. Sermorelin 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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