What is the difference between Hexarelin and GHRH (1–44)?

Hexarelin (Hexarelin (HEX)) is graded B and is Not FDA-approved — research compound (cardioprotective signals investigated). GHRH (1–44) (Growth Hormone Releasing Hormone, full sequence) is graded A and is FDA-approved (Geref) historically as diagnostic GH stimulant; current US availability limited. They are commonly compared because they share the categories: growth-hormone.

Which has stronger clinical evidence — Hexarelin or GHRH (1–44)?

On our internal evidence scale, Hexarelin is B and GHRH (1–44) is A. A+ indicates large RCTs plus FDA approval; C indicates primarily preclinical or anecdotal evidence.

What is the typical dose of Hexarelin vs GHRH (1–44)?

Hexarelin: 100 mcg, 1–2 times daily (subcutaneous). GHRH (1–44): 1 mcg/kg IV (diagnostic test). Always work with a licensed clinician — peptide dosing should be individualized.

Hexarelin vs GHRH (1–44)

Both Hexarelin and GHRH (1–44) are used for growth-hormone. Here's how their evidence, dosing, and regulatory status actually compare.

Hexarelin

Evidence B

Hexarelin (HEX)

The strongest GH-releasing hexapeptide and one of the few peptides with documented direct cardiac benefits in animal models. Tachyphylaxis (diminished response over time) limits long-term use.

View full Hexarelin profile →

GHRH (1–44)

Evidence A

Growth Hormone Releasing Hormone, full sequence

The full 44-amino-acid GHRH sequence. The natural pituitary stimulus for GH release. Largely supplanted in clinical use by sermorelin/tesamorelin but remains a research and diagnostic tool.

View full GHRH (1–44) profile →

Side-by-Side

Attribute	Hexarelin	GHRH (1–44)
Evidence Grade	B	A
FDA Status	Not FDA-approved — research compound (cardioprotective signals investigated)	FDA-approved (Geref) historically as diagnostic GH stimulant; current US availability limited
Typical Dose	100 mcg, 1–2 times daily (subcutaneous)	1 mcg/kg IV (diagnostic test)
Clinics Indexed	41	22
Categories	growth-hormone, recovery	growth-hormone

Key reported benefits — Hexarelin

✓Strongest GH spike of GHRPs
✓Cardioprotective signals
✓Recovery

Key reported benefits — GHRH (1–44)

✓Endogenous GH stimulation
✓Diagnostic GH testing

Educational use only

This comparison is for educational purposes and not medical advice. Peptide selection should be made with a licensed medical professional based on your individual goals, health history, and current evidence quality.

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