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

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. Hexarelin (Hexarelin (HEX)) is graded B and is Not FDA-approved — research compound (cardioprotective signals investigated). They are commonly compared because they share the categories: growth-hormone.

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

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

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

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

GHRH (1–44) vs Hexarelin

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

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 →

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 →

Side-by-Side

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

Key reported benefits — GHRH (1–44)

✓Endogenous GH stimulation
✓Diagnostic GH testing

Key reported benefits — Hexarelin

✓Strongest GH spike of GHRPs
✓Cardioprotective signals
✓Recovery

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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