What is the difference between Hexarelin and PDA?

Hexarelin (Hexarelin (HEX)) is graded B and is Not FDA-approved — research compound (cardioprotective signals investigated). PDA (Pentadeca Arginate (PDA)) is graded C+ and is Not FDA-approved — newer compounded analog of BPC-157. They are commonly compared because they share the categories: recovery.

Which has stronger clinical evidence — Hexarelin or PDA?

On our internal evidence scale, Hexarelin is B and PDA is C+. A+ indicates large RCTs plus FDA approval; C indicates primarily preclinical or anecdotal evidence.

What is the typical dose of Hexarelin vs PDA?

Hexarelin: 100 mcg, 1–2 times daily (subcutaneous). PDA: 200–500 mcg daily (subcutaneous). Always work with a licensed clinician — peptide dosing should be individualized.

Hexarelin vs PDA

Both Hexarelin and PDA are used for recovery. 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 →

PDA

Evidence C+

Pentadeca Arginate (PDA)

A 15-amino-acid arginate analog developed as a more stable, sometimes more bioavailable alternative to BPC-157. Limited published research; popular among compounding pharmacies in 2025–2026.

View full PDA profile →

Side-by-Side

Attribute	Hexarelin	PDA
Evidence Grade	B	C+
FDA Status	Not FDA-approved — research compound (cardioprotective signals investigated)	Not FDA-approved — newer compounded analog of BPC-157
Typical Dose	100 mcg, 1–2 times daily (subcutaneous)	200–500 mcg daily (subcutaneous)
Clinics Indexed	41	41
Categories	growth-hormone, recovery	recovery, anti-inflammatory

Key reported benefits — Hexarelin

✓Strongest GH spike of GHRPs
✓Cardioprotective signals
✓Recovery

Key reported benefits — PDA

✓Tissue repair
✓Anti-inflammation
✓Potentially better stability than BPC-157

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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