Sermorelin is a synthetic peptide that mimics Growth Hormone-Releasing Hormone (GHRH), stimulating the body's natural production of growth hormone (GH). It is typically administered via subcutaneous injection, usually once daily before bedtime. Dosing often begins with a lower amount and gradually increases over several weeks.
- Synthetic GHRH analog that encourages the pituitary gland to release GH naturally.
- Binds to specific GHRH receptors, preserving the body's natural feedback mechanisms.
- Bedtime administration is recommended to align with natural nocturnal GH secretion.
- Typical adult dosing starts at 200 mcg and can titrate up to 500 mcg daily.
- Requires reconstitution with bacteriostatic water; use within 10-14 days after mixing.
Reconstitution
Vial strength
5 mg
Bacteriostatic water
3 mL
Concentration
1.67 mg/mL
1 unit = 0.01 mL = 16.7 mcg
- 1Draw 3.0 mL of bacteriostatic water into a sterile syringe.
- 2Inject the water slowly down the inside wall of the Sermorelin vial.
- 3Gently swirl the vial until the peptide powder is fully dissolved; avoid vigorous shaking.
- 4Label the vial with the reconstitution date and refrigerate at 2-8 °C (36-46 °F), keeping it protected from light.
- 5Before each use, wipe the vial's rubber stopper with an alcohol swab; always use a new sterile needle and syringe for every injection.
Dosing schedule
| Phase | Dose | On a U-100 syringe |
|---|---|---|
| Weeks 1-2 | 200 mcg | 12 units (0.12 mL) |
| Weeks 3-4 | 300 mcg | 18 units (0.18 mL) |
| Weeks 5-6 | 400 mcg | 24 units (0.24 mL) |
| Weeks 7-8 | 500 mcg | 30 units (0.30 mL) |
Protocol detail
| Start | Begin with 200 µg nightly at bedtime, increasing by approximately 100 µg every 1-2 weeks as tolerated. |
|---|---|
| Target | Aim for 300-500 µg nightly by Weeks 5-8, adjusting based on individual response. |
| Frequency | Once per day, administered subcutaneously, preferably before sleep. |
| Cycle Length | Typically 3-6 months for adult research applications. |
| Timing | Administer at bedtime to take advantage of the body's natural nocturnal GH release. Rotate injection sites systematically. |
Overview at a glance
| Goal | To stimulate the pituitary's natural GH release, supporting healthy IGF-1 levels and metabolic processes. |
|---|---|
| Schedule | Daily subcutaneous injections at bedtime. |
| Dose Range | 200-500 µg daily (for adult research use). |
| Reconstitution | 3.0 mL of bacteriostatic water per 5 mg vial, yielding approximately 1.67 mg/mL. |
How it works
Sermorelin functions as a synthetic analog of growth hormone–releasing hormone (GHRH), binding to GHRH receptors in the pituitary gland. This action triggers the pituitary to secrete its own growth hormone in a pulsatile manner, mimicking the body's natural rhythms. Unlike direct growth hormone administration, Sermorelin maintains the body's natural regulatory feedback loops, reducing the risk of excessive GH or IGF-1 levels. This endogenous GH then prompts the liver and other tissues to produce IGF-1, which is crucial for anabolic processes like protein synthesis, fat breakdown, and tissue repair. Its effectiveness relies on a functional pituitary gland.
Reported effects
- Stimulates internal, pulsatile growth hormone release.
- Supports healthy IGF-1 levels.
- May aid in body composition, energy, and recovery (off-label adult use).
- Preserves natural feedback mechanisms, lowering the risk of supraphysiologic hormone levels.
Reported side effects
- Redness, pain, or swelling at the injection site (most common).
- Rare instances of headache, flushing, dizziness, or hives.
- Potential for subclinical hypothyroidism in some individuals (monitoring is advised).
Storage
Lyophilised (unmixed)
Refrigerate at 2-8 °C (36-46 °F) in dry, dark conditions. Do not freeze.
After reconstitution
Refrigerate at 2-8 °C (36-46 °F), protected from light. Use within 10-14 days.
Supplies
| Peptide vials | 4 vials (5 mg each) for an 8-week protocol, or 6-7 vials for a 12-week protocol. Consider an extra vial as backup. |
|---|---|
| Insulin Syringes (U-100) | Approximately 56 syringes for 8 weeks (one 100-count box recommended). Preferred size: 0.3-0.5 mL with 28G-31G, 5/16"-1/2" needle length. |
| Bacteriostatic Water | Approximately 12 mL for 8 weeks (two 10 mL bottles), or 21 mL for 12 weeks (three 10 mL bottles). Do not use if allergic to benzyl alcohol. |
| Alcohol Swabs | At least 112 swabs for 8 weeks (two 100-count boxes recommended). Needed for vial stopper and injection site daily. |
| Sharps Container | One puncture-proof container for safe disposal of used needles. |
Important notes
- Dose nightly at bedtime to synergize with the body's natural GH release.
- Always use a new, sterile insulin syringe for each injection and dispose of it properly.
- Rotate injection sites regularly to prevent irritation and tissue changes.
- Inject slowly into the subcutaneous tissue and allow a moment before withdrawal.
- Consider monitoring IGF-1 levels at baseline and periodically to gauge effectiveness and adjust dosage.
Frequently asked questions
Why is it important to inject Sermorelin at bedtime?
Injecting Sermorelin at bedtime is crucial because our body's natural growth hormone secretion peaks during sleep. Administering the peptide at this time helps align with and enhance this natural nocturnal pulse, maximizing its effectiveness.
How long does a typical Sermorelin cycle last?
For adult off-label research use, a typical Sermorelin cycle often lasts between 3 to 6 months. Some pediatric trials, from which adult dosing is extrapolated, showed significant results over 6-12 months.
Can I use Sermorelin if I have pituitary damage?
Sermorelin requires a functional pituitary gland to be effective, as it works by stimulating the pituitary to release its own growth hormone. It may not be effective in cases of significant pituitary damage or primary growth hormone gene defects.
What should I do if I experience injection site reactions?
Mild redness, pain, or swelling at the injection site is common. Ensure you are rotating injection sites systematically (e.g., abdomen, thighs, upper arms) to prevent irritation. If discomfort persists, allow that specific area a longer break before re-injecting there.
Educational reference only. These figures summarise how Sermorelin is commonly described in research literature and supplier documentation, including the Sermorelin listing at peptidesuk4u.co.uk. They are not a prescription, not medical advice, and not a recommendation to self-administer anything.
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