Hexarelin Dosage Calculator
Calculate hexarelin injection volumes. Pre-filled for a 5mg vial with 2ml BAC water (2,500 mcg/ml). Typical 100mcg dose = 4 units.
Hexarelin is a synthetic GHRP (growth hormone-releasing peptide) that stimulates GH secretion through ghrelin receptor activation. In animal studies it produces among the largest GH responses of the GHRPs, but it also causes more pronounced cortisol and prolactin elevation than selective peptides like Ipamorelin. Commonly referenced research doses are 100mcg per injection.
For a 5mg Hexarelin vial: add 2ml of bacteriostatic water → concentration is exactly 2500 mcg/ml. A commonly referenced 100mcg research dose = 0.04ml (4 units) on a 100-unit syringe.
Dose Reference Table
Pre-calculated for a 5mg vial + 2ml BAC water = 2,500 mcg/ml concentration. Using a 100-unit (1ml) insulin syringe.
| Dose | Inject Volume (ml) | Syringe Units |
|---|---|---|
| 50mcg | 0.020 ml | 2 units |
| 100mcg | 0.040 ml | 4 units |
| 150mcg | 0.060 ml | 6 units |
| 200mcg | 0.080 ml | 8 units |
| 300mcg | 0.120 ml | 12 units |
About Hexarelin
Hexarelin is a synthetic hexapeptide and GHRP (Growth Hormone-Releasing Peptide) that stimulates GH release from the pituitary gland. In animal studies it produces a larger GH response than GHRP-6 or Ipamorelin. Beyond GH secretion, hexarelin has been studied for cardioprotective properties — it binds to CD36 receptors on cardiac tissue, making it unique among GHRPs.
This cardiovascular research angle has drawn particular interest: animal studies have reported protective effects on cardiac function independent of GH release, suggesting direct mechanisms at the heart level. This has led to research into hexarelin for cardiac protection, recovery from ischemic events, and heart failure models.
Hexarelin is supplied in 5mg vials. Using 2ml of bacteriostatic water gives 2,500 mcg/ml. Common research doses range from 100–200mcg per injection, 2–3 times daily. Note that hexarelin produces desensitization (reduced response) with prolonged continuous use — research protocols often cycle its use.
How this calculator works
Every result comes from the same three formulas used for any lyophilized peptide: concentration (mcg/ml) = vial mg × 1,000 ÷ BAC water ml; injection volume (ml) = desired dose mcg ÷ concentration; syringe units = injection volume ml × 100 on a U-100 syringe.
For the preset Hexarelin setup on this page: a 5mg vial mixed with 2ml of bacteriostatic water gives a concentration of 2,500 mcg/ml. A 100mcg dose then needs 0.04ml, which is 4 units on a 100-unit insulin syringe.
The full methodology, with worked examples and the assumptions behind each formula, is on the methodology page.
Accuracy & limitations
The arithmetic itself is exact — the same inputs always produce the same output. Real-world accuracy depends on things outside the calculator: actual vial contents can vary slightly from the labeled amount within manufacturing tolerance, the BAC water volume should be measured carefully, and syringe readings are taken at the bottom edge of the plunger. Reconstituted peptides also degrade over time (the common guidance is to use within about 28 days refrigerated), which the math does not model. This tool does arithmetic only — it does not recommend doses, and it is not medical advice.
Last reviewed: September 2026 · Content, formulas and sources checked by Kanika