Side-by-Side Comparison · 2026

Neuropeptide B vs Neuropeptide W

Neuropeptide B vs Neuropeptide W — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Neuropeptide B
Hypothalamic Neuropeptide

Neuropeptide B (NPB) is a 23-29 amino acid neuropeptide that, along with Neuropeptide W (NPW), activates the orphan G-protein-coupled receptors NPBWR1 (GPR7) and NPBWR2 (GPR8). A unique feature of NPB is the bromination of its N-terminal tryptophan residue, the only naturally occ...

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Neuropeptide W
Hypothalamic Neuropeptide

Neuropeptide W (NPW) is a 23-30 amino acid peptide that, along with Neuropeptide B (NPB), constitutes the endogenous ligand pair for NPBWR1 (GPR7) and NPBWR2 (GPR8) receptors. Unlike NPB, NPW lacks the brominated tryptophan but shares the N-terminal tryptophan important for recep...

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Key Parameters
Parameter Neuropeptide B Neuropeptide W
Category Hypothalamic Neuropeptide Hypothalamic Neuropeptide
Research Preclinical Research Preclinical Research
Half-Life Minutes (estimated) Minutes (estimated)
Typical Dose 1-10 nmol ICV (rodent) 1-10 nmol ICV (rodent)
Frequency Single dose per study Single dose per study
Route ICV (research) ICV, SC (research)
FDA Status Research compound Research compound

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Frequently Asked Questions
What is the difference between Neuropeptide B and Neuropeptide W?
Neuropeptide B: Neuropeptide B (NPB) is a 23-29 amino acid neuropeptide that, along with Neuropeptide W (NPW), activates the orphan G-protein-coupled receptors NPBWR1 (GPR7) and NPBWR2 (GPR8). A unique feature of NPB... Neuropeptide W: Neuropeptide W (NPW) is a 23-30 amino acid peptide that, along with Neuropeptide B (NPB), constitutes the endogenous ligand pair for NPBWR1 (GPR7) and NPBWR2 (GPR8) receptors. Unlike NPB, NPW lacks th...
Which has a longer half-life, Neuropeptide B or Neuropeptide W?
Neuropeptide B half-life: Minutes (estimated). Neuropeptide W half-life: Minutes (estimated).
Can you stack Neuropeptide B and Neuropeptide W?
Neuropeptide B and Neuropeptide W 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.