Skip to content
Dosage GuideResearch Reference

Sermorelin Dosage

Research-based dosing protocols, timing guidance, and reconstitution reference for Sermorelin. All information is for educational purposes only.

Quick Answer

Sermorelin is commonly researched and prescribed (off-label via compounding pharmacy) at 200–500 mcg per night, administered subcutaneously 30–60 minutes before sleep. This bedtime dosing aligns with the body's natural nocturnal GH pulse. Unlike experimental peptides, sermorelin has an established compounding pharmacy prescription pathway and FDA historical approval data for safety reference.

→ Sermorelin Benefits→ Sermorelin Side Effects→ Full Sermorelin Profile
Table of Contents

Standard Dosage Range

Research dosing range: 200–500 mcg per injection, typically once daily at bedtime

Educational reference only

These dosage ranges are derived from preclinical research and community protocols. No human clinical dose-ranging trials have established therapeutic doses for most research peptides. Always consult a qualified healthcare provider before starting any peptide protocol.

Dosage by Use Case

Adult GH Deficiency / Age-Related GH Decline

200–300 mcg1× daily, 30–60 min before sleep
Duration

3–6 months minimum

The most studied application. Pre-bed injection targets the largest natural GH pulse of the day. Sermorelin's short half-life (~10–20 minutes) requires daily dosing for ongoing effect.

Body Composition Optimization

300–500 mcg1× daily (pre-bed) or 2× daily (pre-bed + morning)
Duration

6–12 months

Longer cycles required for meaningful body composition changes. Some protocols add a morning fasted injection for additional daily GH pulses.

Sleep Improvement

200–300 mcg1× daily, 45–60 min before sleep
Duration

8–12 weeks

Pre-sleep dosing amplifies nocturnal GH release and is associated with improved slow-wave sleep depth. May be the most reliably noticeable subjective effect for most users.

Post-Injury Recovery / Tissue Repair

300–500 mcg1–2× daily
Duration

8–16 weeks

GH stimulation supports collagen synthesis, tissue repair, and IGF-1 elevation. Can be combined with healing peptides (BPC-157, TB-500) via separate injection.

Timing & Frequency

Sermorelin's very short half-life (~10–20 minutes, the shortest of any GHRH analog) means its therapeutic window is brief — it stimulates GH release and is then rapidly cleared. Bedtime injection is strongly recommended as the primary dose because it coincides with the natural nocturnal GH pulse (the body's largest GH secretion event of the day, occurring in the first hours of deep sleep). Inject in a fasted state — at minimum 2 hours post-meal — to avoid insulin suppression of the GH response.

Cycle Guidance

Sermorelin is commonly used in longer cycles than experimental GH peptides — often 6–12 months — reflecting its historical clinical use pattern under prescription. Unlike synthetic HGH, sermorelin does not suppress the natural GH axis, allowing for continuous use without the axis atrophy associated with exogenous GH. Periodic bloodwork (IGF-1, fasting glucose, thyroid) is recommended every 3 months during extended protocols.

Reconstitution Reference

Quick reference for reconstituting Sermorelin. For custom vial sizes and concentrations, use the Reconstitution Calculator.

Common Vial SizeTypically 3 mg, 6 mg, or 9 mg vials from compounding pharmacies; 2–5 mg for research suppliers
BAC Water Volume3 mL per 3 mg vial = 1 mg/mL (1,000 mcg/mL)
Concentration & DrawAt 1 mg/mL: 300 mcg dose = 0.3 mL = 30 units on a 100-unit insulin syringe
StorageRefrigerate at 2–8°C after reconstitution. Sermorelin is particularly sensitive to temperature fluctuations.
StabilityReconstituted: 7–14 days refrigerated (shorter stability than BPC-157 or ipamorelin). Lyophilized: 12–24 months.
Use the Reconstitution Calculator → for precise injection volumes based on your exact vial size, water volume, and desired dose.

Frequently Asked Questions

What is the standard sermorelin dosage for adults?
200–500 mcg per injection, once daily at bedtime, is the most common protocol. Clinical prescriptions via compounding pharmacies (where sermorelin is available for off-label use) typically start at 200–300 mcg and may increase based on IGF-1 response and clinical goals. The bedtime injection is critical for aligning with the natural nocturnal GH pulse.
When should I inject sermorelin?
Before sleep — 30–60 minutes before bedtime — is the strongly preferred timing. Sermorelin amplifies the natural nocturnal GH pulse that occurs in the first hours of deep sleep. Secondary injections (if using a 2× daily protocol) are typically taken in the morning in a fasted state. Insulin levels must be low at injection time — avoid injecting within 2 hours of a meal.
How do I calculate my sermorelin injection volume?
Use the Reconstitution Calculator (/tools/reconstitution-calculator). Most common: 3 mg vial + 3 mL BAC water = 1,000 mcg/mL. For a 300 mcg dose: 300 ÷ 1,000 = 0.3 mL = 30 units on a 100-unit syringe. Compounding pharmacy kits usually come with pre-labeled dosing instructions based on vial concentration.
Is sermorelin stronger than ipamorelin?
They work through different receptor pathways and are not directly comparable for "strength." Sermorelin acts on the GHRH receptor (amplifying GH pulse amplitude), while ipamorelin acts on the ghrelin receptor (triggering GH release timing). The combination of both (equivalent to CJC-1295 + ipamorelin but with sermorelin substituted) is synergistic — producing more GH than either alone. Ipamorelin is generally considered to have a cleaner profile with no cortisol elevation.
How long does sermorelin take to work?
Sleep improvement (deeper sleep, more vivid dreams) is often the first effect noticed — within 2–4 weeks. Body composition changes (fat loss, lean mass improvements) require 3–6 months of consistent use. IGF-1 levels are a measurable biomarker — test after 6–8 weeks of use. Full anti-aging and body composition effects typically require 6–12 month protocols.
Can sermorelin be obtained with a prescription?
In the United States, sermorelin is available through compounding pharmacies with a physician's prescription. The original FDA approval (as Geref, for pediatric GH deficiency) was discontinued by the manufacturer, but sermorelin can be legally compounded for off-label adult use. Anti-aging clinics and telehealth providers commonly prescribe it. This distinguishes sermorelin from fully experimental peptides like ipamorelin or CJC-1295.

References

  1. 1
    Sermorelin: a better approach to management of adult-onset growth hormone insufficiency?(2006)PubMed ↗
  2. 2
    Effects of sermorelin on growth hormone release in adults(1998)PubMed ↗
  3. 3
    Growth hormone-releasing hormone analogs: structure-activity relationships(1999)PubMed ↗
  4. 4
    Sermorelin acetate in the treatment of growth hormone deficiency(1996)PubMed ↗
  5. 5
    Clinical pharmacokinetics of sermorelin and GHRH in normal adults(1991)PubMed ↗

Last updated: 2026-02-26