How Tesamorelin is dosed in the research literature, why it is taken at night, reconstitution math for a 10 mg vial, cycle length, and how it differs from…
How Tesamorelin is dosed in the research literature, why it is taken at night, reconstitution math for a 10 mg vial, cycle length, and how it differs from other GHRH analogs.
Tesamorelin is a stabilised growth-hormone-releasing hormone (GHRH) analog. Like sermorelin and CJC-1295 it acts upstream on the pituitary rather than supplying growth hormone directly, which is why the research literature describes a pulsatile, feedback-preserving GH response rather than a flat elevation.
Tesamorelin binds the GHRH receptor on somatotroph cells in the anterior pituitary, prompting the release of endogenous growth hormone, which in turn raises circulating IGF-1. Because the pituitary's own negative-feedback loop stays intact, the resulting GH profile follows the body's natural pulse pattern. This is the central mechanical difference between a secretagogue and exogenous growth hormone.
The figures below are the ranges documented across the published research base. They are reference points for understanding protocols, not a personal recommendation — dosing decisions belong with a licensed practitioner.
The dominant GH pulse in a normal 24-hour cycle occurs shortly after sleep onset. Dosing a GHRH analog in the evening layers the stimulus onto that pulse rather than fighting the daytime trough, which is why virtually every documented protocol specifies a bedtime administration. Eating a large meal immediately before injection is generally avoided in these protocols, since elevated blood glucose blunts GH release.
Reconstitution depends only on the total volume of bacteriostatic water you add. A 10 mg vial reconstituted with 2 mL of bacteriostatic water yields 5 mg/mL; 0.2 mL on a U-100 insulin syringe (20 units) therefore delivers 1 mg. Add 1 mL instead and the same vial yields 10 mg/mL, where 10 units delivers 1 mg. Our reconstitution calculator runs this arithmetic for any vial size and target dose.
Sermorelin is the original GHRH (1-29) fragment with a 10–20 minute half-life. CJC-1295 was engineered for stability and runs roughly 30 minutes without DAC. Tesamorelin sits in the same family but is the analog with the deepest clinical documentation for a specific metabolic endpoint — visceral adipose tissue — which is why it appears in protocols oriented around body composition rather than general recovery.
Keep lyophilised vials refrigerated and out of light. After reconstituting with bacteriostatic water, store at 2–8 °C and treat the working window as roughly 28 days — the rating of the preservative in bacteriostatic water. Never freeze a reconstituted vial, and never use plain sterile water for a vial you intend to use across multiple days.
For the underlying reconstitution procedure see our step-by-step guide to reconstituting peptides with bacteriostatic water, and for a uniform-format reference on 40+ compounds see the peptide guide in our Education Center.
Editorial overview only. All peptide products referenced are intended solely for research, investigational, or licensed professional use. Conduct your own research and consult a trusted, licensed medical practitioner before any personal or clinical use.
| Peptide | Category | Summary |
|---|---|---|
| Sermorelin | Growth Hormone Support | Sermorelin is a 29-amino-acid GHRH analog representing the bioactive fragment of natural growth hormone–releasing hormone. It has one of the longest track records of any GH-supporting peptide in clinical-research literature. |
| CJC-1295 | Growth Hormone Support | CJC-1295 (no-DAC) is a 30-amino-acid GHRH analog that triggers pulsatile growth-hormone release from the pituitary. It is most commonly paired with Ipamorelin in research protocols for a stronger combined GH pulse. |
| Ipamorelin | Growth Hormone Support | Ipamorelin is a pentapeptide growth-hormone secretagogue. It is valued in research for its selectivity — stimulating GH release with minimal cortisol or prolactin effect — making it the default ghrelin-side partner for CJC-1295 protocols. |
Published 2026-09-07 by the Clarity Wellness editorial team. Approximate reading time: 8 minutes. Our sourcing and review policy is published at /editorial-standards.
All peptide products referenced are intended solely for research, investigational, or licensed professional use. They are not FDA-approved and are not intended to diagnose, treat, cure, or prevent any disease. Consult a licensed medical practitioner before any personal or clinical use.