Side-by-Side Comparison · 2026

Relaxin-3 vs Xenopsin

Relaxin-3 vs Xenopsin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Relaxin-3
Neuropeptide

Relaxin-3 (also called INSL7) is the most ancient member of the insulin/relaxin superfamily and is expressed predominantly in the nucleus incertus (NI) of the brainstem, a structure implicated in stress, arousal, and hippocampal theta rhythm generation. Unlike relaxin-1 and relax...

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Xenopsin
Neuropeptide

Xenopsin is an octapeptide originally isolated from the skin of the South African clawed frog Xenopus laevis. It shares structural similarity with the C-terminal portion of neurotensin and activates neurotensin receptors....

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Key Parameters
Parameter Relaxin-3 Xenopsin
Category Neuropeptide Neuropeptide
Research Preclinical Research Preclinical
Half-Life ~30-60 minutes (estimated) Short
Typical Dose 100-500 pmol ICV; 1-3 nmol/kg SC N/A (research)
Frequency Single or twice daily (preclinical) N/A
Route ICV, SC (preclinical) IV / ICV (research)
FDA Status Research compound Not approved

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Frequently Asked Questions
What is the difference between Relaxin-3 and Xenopsin?
Relaxin-3: Relaxin-3 (also called INSL7) is the most ancient member of the insulin/relaxin superfamily and is expressed predominantly in the nucleus incertus (NI) of the brainstem, a structure implicated in stre... Xenopsin: Xenopsin is an octapeptide originally isolated from the skin of the South African clawed frog Xenopus laevis. It shares structural similarity with the C-terminal portion of neurotensin and activates n...
Which has a longer half-life, Relaxin-3 or Xenopsin?
Relaxin-3 half-life: ~30-60 minutes (estimated). Xenopsin half-life: Short.
Can you stack Relaxin-3 and Xenopsin?
Relaxin-3 and Xenopsin 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.