Side-by-Side Comparison · 2026

Obestatin vs Xenin-25

Obestatin vs Xenin-25 — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Obestatin
GI Peptide

Obestatin is a 23-amino acid amidated peptide derived from the same preproghrelin precursor gene that produces ghrelin. Discovered in 2005 by Zhang et al....

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Xenin-25
GI Peptide

Xenin-25 is a 25-amino acid peptide co-secreted with GIP (glucose-dependent insulinotropic polypeptide) from intestinal K-cells in response to fat and carbohydrate ingestion. Xenin is structurally and functionally related to the neurotensin peptide family....

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Key Parameters
Parameter Obestatin Xenin-25
Category GI Peptide GI Peptide
Research Research Research
Half-Life 22-23 min (plasma) 3-4 min (plasma)
Typical Dose 8-100 nmol/kg (animal) 4-12 pmol/kg/min (IV research infusion)
Frequency Variable Post-prandial or research infusion
Route Subcutaneous, Intravenous Intravenous, Subcutaneous
FDA Status Not approved Not approved

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Frequently Asked Questions
What is the difference between Obestatin and Xenin-25?
Obestatin: Obestatin is a 23-amino acid amidated peptide derived from the same preproghrelin precursor gene that produces ghrelin. Discovered in 2005 by Zhang et al.... Xenin-25: Xenin-25 is a 25-amino acid peptide co-secreted with GIP (glucose-dependent insulinotropic polypeptide) from intestinal K-cells in response to fat and carbohydrate ingestion. Xenin is structurally and...
Which has a longer half-life, Obestatin or Xenin-25?
Obestatin half-life: 22-23 min (plasma). Xenin-25 half-life: 3-4 min (plasma).
Can you stack Obestatin and Xenin-25?
Obestatin and Xenin-25 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.