Side-by-Side Comparison · 2026

Apelin-13 vs Apelin-17

Apelin-13 vs Apelin-17 — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Apelin-13
Cardiovascular Peptide

Apelin-13 is the most biologically active isoform of the apelin peptide family, endogenous ligands for the APJ receptor (also called APLNR). Apelin peptides are produced throughout the body, with the heart, lung, brain, and adipose tissue expressing particularly high levels....

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Apelin-17
Cardiovascular Peptide

Apelin-17 is a 17-amino acid C-terminal fragment of the prepro-apelin precursor that binds and activates the APJ receptor (now APLNR) with the highest potency of all naturally occurring apelin isoforms. While apelin-13 is the best-characterized isoform, apelin-17 shows greater re...

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Key Parameters
Parameter Apelin-13 Apelin-17
Category Cardiovascular Peptide Cardiovascular Peptide
Research Clinical Preclinical / Phase I
Half-Life < 5 min (plasma) ~3-5 minutes IV (longer than apelin-13)
Typical Dose 50-300 nmol/kg 30-100 nmol/kg/min (IV infusion, clinical)
Frequency Variable Acute infusion protocols
Route Intravenous (research), Subcutaneous IV infusion (clinical studies); SC under investigation
FDA Status Not approved Investigational (Phase I/II)

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Frequently Asked Questions
What is the difference between Apelin-13 and Apelin-17?
Apelin-13: Apelin-13 is the most biologically active isoform of the apelin peptide family, endogenous ligands for the APJ receptor (also called APLNR). Apelin peptides are produced throughout the body, with the ... Apelin-17: Apelin-17 is a 17-amino acid C-terminal fragment of the prepro-apelin precursor that binds and activates the APJ receptor (now APLNR) with the highest potency of all naturally occurring apelin isoform...
Which has a longer half-life, Apelin-13 or Apelin-17?
Apelin-13 half-life: < 5 min (plasma). Apelin-17 half-life: ~3-5 minutes IV (longer than apelin-13).
Can you stack Apelin-13 and Apelin-17?
Apelin-13 and Apelin-17 are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.