Side-by-Side Comparison · 2026

Bombesin vs CCK

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

Bombesin
GI Neuropeptide

Bombesin is a 14-amino acid neuropeptide originally isolated from the skin of the European frog Bombina bombina. Its mammalian analogs gastrin-releasing peptide (GRP) and neuromedin B (NMB) are produced throughout the gastrointestinal tract and central nervous system....

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CCK
GI Neuropeptide

Cholecystokinin (CCK) is a peptide hormone and neuropeptide produced in the intestinal I-cells and CNS neurons. Multiple biologically active forms exist (CCK-4, CCK-8, CCK-33, CCK-58), with CCK-8 being the most studied....

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Key Parameters
Parameter Bombesin CCK
Category GI Neuropeptide GI Neuropeptide
Research Research Clinical
Half-Life Minutes (plasma) 1-2 min (plasma)
Typical Dose 10-100 nmol/kg (animal) 20-100 ng/kg (IV infusion)
Frequency Variable Variable
Route Subcutaneous, Intravenous Intravenous (clinical), Subcutaneous
FDA Status Not approved Approved (Sincalide/CCK-8, gallbladder imaging)

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Frequently Asked Questions
What is the difference between Bombesin and CCK?
Bombesin: Bombesin is a 14-amino acid neuropeptide originally isolated from the skin of the European frog Bombina bombina. Its mammalian analogs gastrin-releasing peptide (GRP) and neuromedin B (NMB) are produc... CCK: Cholecystokinin (CCK) is a peptide hormone and neuropeptide produced in the intestinal I-cells and CNS neurons. Multiple biologically active forms exist (CCK-4, CCK-8, CCK-33, CCK-58), with CCK-8 bein...
Which has a longer half-life, Bombesin or CCK?
Bombesin half-life: Minutes (plasma). CCK half-life: 1-2 min (plasma).
Can you stack Bombesin and CCK?
Bombesin and CCK 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.