What Cholecystokinin is
Cholecystokinin is an endogenous gut peptide involved in satiety, gallbladder contraction, and digestive signaling.
Cholecystokinin is grouped under Endogenous / Biology / Fat Loss + GLP-1s on PeptideFactCheck because it helps explain appetite and digestive peptide biology beyond the incretin family.
The useful starting point is to separate the molecule itself from the internet story around it. It helps explain appetite and digestive peptide biology beyond the incretin family.
Why people keep looking it up
It helps explain appetite and digestive peptide biology beyond the incretin family.
Cholecystokinin is an endogenous gut peptide involved in satiety, gallbladder contraction, and digestive signaling.
Cholecystokinin tends to stay in the conversation because it touches a familiar public theme: gut hormone, satiety signaling, and digestive control. That makes it easy for the claim to travel faster than the evidence.
What the evidence can support right now
High-confidence peptide physiology reference entry.
Human physiology is well described, though this is mostly a reference entry rather than a commercial peptide story.
Mechanistic support across digestive and satiety physiology is strong.
Why this page carries the current tier: High-confidence peptide physiology reference entry.
The current seed trail for Cholecystokinin is pulling from 2 databases sources and 1 literature source.
Safety, limits, and regulatory context
It should be treated as physiology first, not marketing copy.
CCK is tracked here as endogenous biology.
Editorial boundary: PeptideFactCheck does not publish dosing, cycling, sourcing, injection, or administration instructions for Cholecystokinin. The job here is to explain the public claim, the mechanism story, the evidence strength, and the current limits.
Molecular and identifier data
The current PubChem match for Cholecystokinin is CID 9833444. That gives the page a source-backed chemistry record rather than a placeholder identifier block.
- PubChem CID
- 9833444
- Formula
- C49H62N10O16S3
- Molecular weight
- 1143.3
- InChIKey
- IZTQOLKUZKXIRV-YRVFCXMDSA-N
Matched synonyms include Sincalide, 25126-32-3, CCK-8, Kinevac, Sincalida, CCK-8S, Sincalidum, Syncalide.
Open PubChem recordClinical trial snapshot
The current ClinicalTrials.gov intervention query for Cholecystokinin returns 31 study records. This does not prove efficacy by itself, but it does show whether the peptide is showing up in a formal trial registry rather than only in forums or vendor copy.
Literature snapshot
The current PubMed query for Cholecystokinin returns 48839 results. The articles below are a quick literature surface so the page shows actual papers instead of only generic evidence labels.
Label and regulatory records
For approved or clinically developed peptides, the page now pulls in official labeling and FDA-facing records where they exist. That makes the regulatory section materially more useful than a generic approved or not-approved tag.
- Brand names
- Melancholy Drops Extrovert 2015
- Generic names
- MELANCHOLY DROPS EXTROVERT
- Routes
- ORAL
- Application numbers
- Not linked
Indications and usage. INDICATIONS For the temporary relief of sadness or fatigue, particularly in those with extroverted personality.*
Source trail
Each linked source is shown directly so the page can be audited. The page now combines its editorial seed trail with automated official-source enrichment generated on 2026-04-24 from PubChem, ClinicalTrials.gov, PubMed, DailyMed, openFDA label, and Drugs@FDA.