
Peptilex – The Peptide Encyclopedia
- 34 peptides – from semaglutide to BPC-157 – in one book
- An evidence grade (A–E) and the key studies for every peptide
- Where each one stands in 2026 – US, EU and Switzerland
Weight
Different trials, durations and populations – not a head-to-head comparison.
Sources: REDEFINE 1 · NEJM 2025 · REDEFINE 5 · 2026 · REDEFINE 2 · NEJM 2025
| Trial | CagriSema | Comparison |
|---|---|---|
| REDEFINE 1 | 20.4% | 3.0% |
| REDEFINE 5 | 18.4% | 11.9% · Semaglutide |
| REDEFINE 2 | 13.7% | 3.4% |
The amylin-plus-semaglutide combination led to 20.4% average weight loss over 68 weeks in REDEFINE 1, and in the 2026 head-to-head trial REDEFINE 5 it reached 18.4% versus 11.9% on semaglutide alone. It was submitted to the FDA in December 2025; a decision is expected in late 2026.
| GLP-1 | GIP | Glucagon | Amylin | |
|---|---|---|---|---|
| Liraglutide1× | ||||
| Semaglutide1× | ||||
| Tirzepatide2× | ||||
| Retatrutide3× | ||||
| CagriSema2× |
Source: Peptilex 1, profile overview (type of each peptide)
Go deeper
What it is, how it acts, the key studies, risks and open questions.


Source: PubMed and ClinicalTrials.gov via the Peptilex study database
Source: PubMed and ClinicalTrials.gov via the Peptilex study database
Source: PubMed and ClinicalTrials.gov via the Peptilex study database
ClinicalTrials.gov · name in study title · ongoing first
Showing 25 of 40 matching registered studies. See all on ClinicalTrials.gov.
PubMed · newest first
Human RCTBusetto L et al. · Diabetes, Obesity & MetabolismPMID 42503495
Meta-analysisNong K et al. · BMJPMID 42419792
Meta-analysisDamen JAA et al. · Annals of Internal MedicinePMID 42296503
Human RCTPhase 3Aroda VR et al. · Lancet Diabetes & EndocrinologyPMID 42251860
Human RCTPhase 3Buse JB et al. · Lancet Diabetes & EndocrinologyPMID 42251859
Human RCTPhase 3Rosenstock J et al. · The LancetPMID 42251856
Human RCTPhase 1Nielsen MJF et al. · Clinical PharmacokineticsPMID 42228334
Meta-analysisHamarsheh S et al. · Endocrinology, Diabetes & MetabolismPMID 42207966