Choose any two compounds below to see them side by side. Each comparison page lines up the level of evidence behind each one, the registered clinical trials, and where each stands with regulators, so the differences are easy to see in one place.
This is a side-by-side of what is documented, not a ranking. Different compounds are studied for different things, in different people, at different amounts. A row that looks stronger for one compound does not make it the better choice for anyone.
| Retatrutide | Survodutide | |
|---|---|---|
| Highest evidence tier on the page | E2 Human clinical evidence Registered or peer-reviewed human trial with reported results. | E2 Human clinical evidence Registered or peer-reviewed human trial with reported results. |
| Regulatory status | In clinical development, not approved | In clinical development, not approved |
| Research area | Metabolic and incretin | Metabolic and incretin |
| Regulator-approved dose on file | No approved dose | No approved dose |
| Molecular formula | Not reliably established | C192H289N47O61, from a chemical supplier data sheet only, not confirmed against a peer-reviewed or regulatory source |
| Molar mass | Not reliably established | 4231.7, from a chemical supplier data sheet only, not confirmed against a peer-reviewed or regulatory source |
| CAS number | 2381089-83-2 | 2805997-46-8, from vendor catalogues, and salt-form assignments in those catalogues are not reliable |
| Registered trials on this site | 9 in the tracker | 14 in the tracker |
| Furthest registered phase | Phase 3 | Phase 3 |
| Trials currently active | 0 | 2 |
| Trial sponsors | Eli Lilly and Company | Boehringer Ingelheim |
| Published trials covered on its page | 8 | 7 |
| Amounts studied in those trials | NCT04867785: Retatrutide 0.5, 4, 8 or 12 mg once weekly, dulaglutide 1.5 mg once weekly, or placebo; the 4 mg and 8 mg maintenance doses were each given twice, differing only in starting dose for 36 weeks NCT04881760: Retatrutide 1, 4, 8 or 12 mg once weekly, or placebo, across seven arms; the 4 mg and 8 mg arms each ran with a 2 mg or a 4 mg starting dose for 48 weeks TRIUMPH-1, NCT05929066: Retatrutide 4, 9 or 12 mg once weekly after a 16 week fixed escalation, or placebo, 1:1:1:1 for 80 weeks, with an optional 24 week extension for about 500 participants As reported on the compound page. Amounts are not comparable between compounds. | NCT04153929: Survodutide up to 0.3, 0.9, 1.8 or 2.7 mg once weekly, or 1.2 or 1.8 mg twice weekly, against placebo and open label semaglutide up to 1.0 mg once weekly for 16 weeks NCT04667377: Survodutide 0.6, 2.4, 3.6 or 4.8 mg once weekly, or placebo, 1:1:1:1:1 for 46 weeks, 20 weeks of escalation then 26 weeks of maintenance NCT04771273: Survodutide 2.4, 4.8 or 6.0 mg once weekly, or placebo, 1:1:1:1 for 48 weeks, 24 weeks of rapid escalation then 24 weeks of maintenance As reported on the compound page. Amounts are not comparable between compounds. |
| What is not known | Its molecular weight. Figures circulate in chemical catalogues, but no primary publication or regulatory document names one, so none is asserted here. Whether it prevents anything. No cardiovascular or kidney outcome data exist. TRIUMPH-Outcomes, 10,000 participants across 743 sites, has a primary completion date of... | Whether survodutide raises energy expenditure in a human being. That is the central mechanistic claim made for the compound, it rests on rodent indirect calorimetry that reached significance at one dose on two days with no change in core temperature or activity, and it has... |
Full pages: Retatrutide and Survodutide. See also the clinical trial tracker and how we grade evidence.
Educational reference, not medical advice. Trial data from ClinicalTrials.gov. Everything else is drawn from the compound pages on this site, each of which cites its sources.
Most requested comparisons
These are the pairings readers look for most often. Each opens a full side-by-side page.
Weight management compounds
- Retatrutide vs Tirzepatide
- Semaglutide vs Tirzepatide
- Retatrutide vs Semaglutide
- Retatrutide vs Survodutide
- Cagrilintide vs Semaglutide
- Orforglipron vs Semaglutide
- Mazdutide vs Tirzepatide
- Cagrilintide vs Eloralintide
- LY4086940 vs Retatrutide
- LY4086940 vs Orforglipron
Growth hormone related peptides
- Ipamorelin vs Sermorelin
- Sermorelin vs Tesamorelin
- CJC-1295 (no DAC) vs Ipamorelin
- CJC-1295 with DAC vs Ipamorelin
Repair and recovery
Longevity, mitochondria and brain
How to read a comparison
A side-by-side table can make two compounds look equally proven when they are not. Keep these points in mind as you read.
- Evidence level matters more than the headline. Every compound is placed on the same six-tier scale, from published human clinical trials down to community reports. A compound with large human trials and one with only animal studies are not comparable, even when both appear in the same table.
- Registered trials show what is being tested. A trial listed on ClinicalTrials.gov tells you a question is being studied, not that the answer is known. Check the status and phase. You can browse every tracked study on the clinical trial tracker and see recent registry updates in the trial changes feed.
- Regulatory status is specific to a formulation and a country. Approval of one product does not mean every version of that compound is approved.
- Different populations and doses limit direct comparison. Results from separate trials, run in different people over different periods, cannot be lined up as if they came from a head-to-head study unless a comparison page says a head-to-head study exists.
Frequently asked questions
Which compound is better?
These pages do not rank compounds or tell anyone what to use. They show what the published and registered evidence says about each one so you can see where the evidence is strong and where it is thin.
Why are some comparisons mostly empty on one side?
Many popular peptides have little or no human trial data. When that is the case, the comparison says so plainly rather than filling the gap with community claims.
Can I compare doses here?
Reported amounts are documented on each individual peptide page, with the source and evidence tier for every figure. If you need to work out concentrations, the reconstitution calculator is a math tool only and does not suggest an amount.
Where can I see every compound?
The full peptide library lists every entry,.
PeptideBlog is an educational reference compiled from public sources. It is not medical advice, and nothing here is a recommendation for or against any compound.
