Educational research resource. Contains sponsored placement — see editorial disclosure.

Comparison matrix

Compare all metabolic peptides

Every metabolic peptide on this site in one sortable table. Use the column headers to sort by mean weight reduction, half-life, or UK regulatory status; filter to MHRA-licensed or research-only with the chips below.

By Metabolic Peptides Editorial TeamReviewed by Scientific Review PanelLast updated
Filter:
Primary trial
RetatrutideGLP-1/GIP/GlucagonResearchResearch only — not MHRA-licensed~6 days≈24% (Phase 2 NEJM 2023, 48w, 12 mg)Eli LillyNEJM 2023 Phase 2
TirzepatideGLP-1/GIPMHRAMHRA-licensed (Mounjaro)~5 days≈22% (SURMOUNT-1, 72w, 15 mg)Eli LillySURMOUNT-1
SemaglutideGLP-1MHRAMHRA-licensed (Ozempic / Wegovy / Rybelsus)~7 days≈15% (STEP-1, 68w, 2.4 mg)Novo NordiskSTEP-1
LiraglutideGLP-1MHRAMHRA-licensed (Saxenda / Victoza)~13 hours≈8% (SCALE, 56w, 3 mg)Novo NordiskSCALE
AOD-9604Lipolytic fragmentResearchResearch only — not MHRA-approvedShort (preclinical)Phase 2: did not reach significance vs placeboMetabolic PharmaceuticalsMetabolic Pharma Phase 2b
HGH Frag 176-191Lipolytic fragmentResearchResearch only — not MHRA-approvedShort (preclinical)Preclinical rodent data onlyNative HGH fragmentPreclinical
TesamorelinGHRH analogueResearchNot MHRA-approved (FDA-approved Egrifta for HIV lipodystrophy)~26 minutes (plus IGF-1 effect)VAT reduction ~15-18% (Falutz NEJM 2007)TheratechnologiesFalutz NEJM 2007
CJC-1295 / IpamorelinGHRH + GHSR pairResearchResearch only — not MHRA-approvedCJC-1295 DAC ~6-8 d; ipamorelin ~2 hNo registrational weight trialConjuChem (CJC-1295); Helsinn/Tsumura (ipamorelin)Phase 1 PK studies

How to read a comparison on this site

A comparison page is a decision-support surface, not a decision. Each pairwise and cross-class comparison on this site is built from published trial evidence, MHRA / EMA licensed indications, and the underlying pharmacology of the molecules involved. What a comparison can help you do is see how two or three agents sit against each other on a specific, named dimension — receptor profile, dose schedule, weight-reduction magnitude in a comparable trial population, cardiovascular outcome evidence, UK regulatory status. What it cannot do is tell you which medicine is right for any individual.

The two comparison shapes on this hub are distinct. Pairwise comparisons put two molecules side by side and are most useful when the choice is genuinely between two options with overlapping licensed indications (e.g., semaglutide vs tirzepatide for weight management). Evidence-led comparisons are broader — cross-class, category-distinction, and topic-anchored — and are useful for orienting yourself when the question is about the state of the evidence rather than a specific choice (e.g., how the GLP-1 class as a whole compares on cardiovascular outcomes, or how NHS access differs between Mounjaro and Wegovy).

Every comparison inherits the site's source hierarchy: the primary trial publication is the anchor, followed by MHRA / EMA regulatory documents (SmPC, EPAR), followed by peer-reviewed meta-analysis where available. Editorial synthesis on a comparison page never replaces those primary sources — it aggregates them so a reader can see the differences at a glance, then follow the reference links for the exact numerical results. If a comparison page carries a mid-treatment switching scenario, note that head-to-head trials in treatment-naive populations (e.g., SURMOUNT-5) inform switching decisions but do not substitute for prescriber judgement on titration, washout, and individual clinical context.

Nothing on this hub — the sortable matrix at the top, the evidence-led grid below, the pairwise pages — provides prescribing recommendations, dosing schedules, or supplier guidance. Where a decision needs to be made about starting, switching, or stopping a licensed medicine, the decision-maker is a qualified UK prescriber following appropriate clinical assessment.

Evidence-led comparisons

Newer cross-class and evidence-grade comparisons built around UK regulatory status and trial evidence.

Pairwise comparisons

For the deep dive on a specific pair, every comparison page covers receptor pharmacology, head-to-head trial evidence, dosing, side-effect profile and UK regulatory framing.

How to read the matrix

Mean weight reduction is reported at the highest tested dose in each compound's most-cited pivotal trial. Half-life is the elimination half-life of the molecule (steady-state accumulation across multiple doses follows roughly 4-5 half-lives). UK status distinguishes MHRA-licensed prescription medicines (which carry full clinical evidence packages) from research compounds supplied for laboratory and analytical use only. For full mechanism and safety detail, click any peptide name.