Sermorelin
Sermorelin is a synthetic analog of GHRH consisting of the first 29 amino acids of the natural hormone. It was previously FDA-approved for GH deficiency diagnosis and treatment in children.
Mechanism of Action
Binds to GHRH receptors in the pituitary gland to stimulate natural GH production and release. Maintains the body's natural feedback mechanisms for GH regulation.
Dosage Overview
Dose Range
100 mcg – 300 mcg
Route
subcutaneous
Frequency
1x daily
Cycle Length
8–12 weeks
Reconstitution
Typical Dosage (Research)
Typical dosing: 200-500mcg administered once daily, usually before bed. Some protocols use twice daily dosing.
Subcutaneous injection, preferably at bedtime to work with natural GH release patterns. Can be combined with GHRPs for synergistic effects.
Considerations for Men & Women
Women: Women typically have higher baseline GH pulse amplitude but lower pulse frequency. Sermorelin may produce a more pronounced GH response in premenopausal women. Estrogen status affects GH axis responsiveness — postmenopausal women may need different dosing considerations.
Men: GH response to sermorelin is influenced by testosterone status. Men with low testosterone may have blunted GH secretion. Often used alongside other GH secretagogues in research protocols.
Individual responses vary. These notes reflect general trends from research literature and are not medical advice.
Quick Calculator
Quick Calculator
Concentration: 2,500 mcg/ml
Volume to inject: 0.04 ml
Syringe units (U-100): 4.0 units
Pre-filled with Sermorelin defaults. Adjust values as needed.
Side Effects & Risks
Generally well-tolerated. May cause injection site reactions, headache, flushing, or dizziness. Less side effects than direct GH administration.
May not be effective in those with pituitary dysfunction. Long-term effects not fully characterized. Quality varies between sources.
Where to Buy Sermorelin
All Vendor Details →US-based vendor with third-party HPLC testing and published COAs. One of the few reputable sources we've verified for research-grade peptides.
Some links on this page are affiliate links — we may earn a commission at no extra cost to you. Learn more.
Finnrick grades are based on independent HPLC lab testing. Learn more · Finnrick is a commercial service — ratings are third-party, not independent.
Who Uses Sermorelin
Those seeking a more natural approach to GH enhancement, anti-aging protocols, individuals with age-related GH decline.
Similar Peptides
View All Alternatives →Mod GRF 1-29 (Modified GRF 1-29, also called CJC-1295 without DAC or Tetrasubstituted GRF 1-29) is a modified growth hormone-releasing hormone analog with improved stability over natural GHRH.
Human Growth Hormone (somatropin) is a 191-amino acid protein identical to naturally produced GH. FDA-approved for growth hormone deficiency, Turner syndrome, and other conditions. Widely used off-label for anti-aging and performance.
Ipamorelin is a selective growth hormone secretagogue that stimulates the release of growth hormone from the pituitary gland without significantly affecting cortisol or prolactin.
MK-677, also known as Ibutamoren, is an orally active growth hormone secretagogue. Unlike peptides, it can be taken orally and has a long half-life, providing 24-hour GH elevation.
IGF-1 LR3 (Long R3 Insulin-like Growth Factor-1) is a modified version of IGF-1 with extended half-life and enhanced potency. The modifications prevent binding to IGF binding proteins, increasing bioavailability.