Mazdutide vs NA-931
Comprehensive side-by-side comparison of mechanisms, dosing, side effects, and research
Also: IBI362, LY3305677
Mazdutide is a GLP-1 and glucagon dual agonist, which puts it between semaglutide (GLP-1 only) and retatrutide (GLP-1, GIP and glucagon). It is built on oxyntomodulin, a natural gut hormone that hits both receptors, rather than on a GLP-1 backbone. It is furthest along in China, where it is approved for both weight management and type 2 diabetes. Western approval has not happened.
Also: Bioglutide, cyclic glycine-proline
NA-931 (Bioglutide) is cyclic glycine-proline, a two-amino-acid ring that occurs naturally as a breakdown product of IGF-1. Its developer, Biomed Industries, describes it as an oral once-daily agonist at four receptors at once - IGF-1, GLP-1, GIP and glucagon - and has reported 13 to 15 percent weight loss in a 126-person Phase 2 trial. Those numbers have only ever appeared in conference abstracts, never in a peer-reviewed paper, and no trial results have been filed to ClinicalTrials.gov. The same molecule is already sold as a consumer brain-health supplement and as a Sigma-Aldrich catalogue chemical, which makes it unusually cheap to source and unusually hard to verify.
Key Comparison Insights
- Both peptides belong to the Weight Loss category, suggesting similar primary applications.
Detailed Comparison
| Attribute | Mazdutide | NA-931 |
|---|---|---|
| Category | Weight Loss | Weight Loss |
| FDA Status | Not FDA Approved | Not FDA Approved |
| Clinical Status | Pre I II III IV FDA | Pre I II III IV FDA |
| Mechanism of Action | Two receptors, two jobs. The GLP-1 arm does the familiar work: it suppresses appetite, slows gastric emptying and improves glucose-dependent insulin release. The glucagon arm is the interesting half, because glucagon is normally thought of as the hormone that raises blood sugar. At these doses the intent is to exploit glucagon's other effects, increasing energy expenditure and pushing the liver to burn fat, while the GLP-1 arm keeps blood glucose in check and cancels out glucagon's hyperglycemic tendency. That balance is the whole design: glucagon supplies extra fat burning that GLP-1 alone cannot, and GLP-1 supplies the safety margin that makes adding glucagon viable. Reported reductions in liver fat are consistent with the glucagon component doing what it is meant to. | Cyclic glycine-proline is a diketopiperazine: glycine and proline joined into a small ring, 154 daltons, roughly a thirtieth the size of tirzepatide or retatrutide. The independent literature, mostly from Jian Guan's group in Auckland, describes a single mechanism: cGP competes with IGF-1 for binding to IGFBP-3, which frees up IGF-1 that was otherwise bound and inactive. That is a bioavailability effect, studied for stroke recovery, Parkinson's and blood pressure rather than for weight. Biomed's own patent filing (WO2025160184A1) goes much further, claiming the same molecule is a 'quadruple receptor agonist' at IGF-1, GLP-1, GIP and glucagon receptors. That claim is worth understanding properly, because it is the entire basis of the weight-loss story. GLP-1, GIP and glucagon receptors are class B GPCRs, the kind that normally need a thirty-plus residue peptide wrapping into the receptor's binding groove to switch on. A 154-dalton ring activating all three would be a genuinely significant pharmacological finding. No independent group has reported it. Searching PubMed for cyclic glycine-proline alongside GLP-1 returns nothing at all. |
| Common Dosing | 4-6 mg weekly Once weekly | 120 mg daily, oral Once daily |
| Administration | Subcutaneous injection, once weekly | Oral capsule or tablet, once daily |
| Typical Duration | Ongoing weekly use in trials, typically assessed at 24 to 48 weeks | 28 days in Phase 1, 13 weeks in Phase 2 |
| Best Time to Take | Same day each week, morning preferred | Consistent daily timing |
Possible Side Effects May vary by individual |
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| Research Summary | The pivotal trial is GLORY-1, published in the New England Journal of Medicine in 2025: 610 Chinese adults with overweight or obesity over 48 weeks. Mean weight reduction was 11.0 percent at 4 mg and 14.0 percent at 6 mg, alongside improvements in liver fat, blood pressure and lipids. A 9 mg dose has since been studied in phase 2 (about 12.8 percent at 24 weeks) and is in phase 3. Tolerability followed the pattern of the whole class, dominated by dose-dependent nausea, vomiting and diarrhea during titration. One caveat matters when reading these numbers: GLORY-1 enrolled a population with a mean BMI of 31.1, against roughly 38 in the Western trials of semaglutide and tirzepatide, so the percentages are not directly comparable to SURMOUNT-1 or STEP-1 results. There is no completed Western phase 3 program, so neither the FDA nor the EMA has assessed it, and meaningful head-to-head data against tirzepatide or retatrutide does not exist. | There are no peer-reviewed publications on NA-931. Not one. Everything in circulation is a conference abstract, and the abstracts carrying the efficacy numbers list Biomed's CEO as sole author with conflicts declared as 'None'. Two trials have completed, both run entirely in Australia: a 74-person Phase 1 (NCT06615700, completed September 2024) and a 126-person Phase 2 (NCT06564753, completed April 2025). Neither has results posted. A third trial (NCT06732245) would run in the US, Australia and New Zealand, but has not started recruiting. The reported weight loss is where this gets difficult. The same 126-person Phase 2 has been presented three times with three different numbers: 14.8 percent at ADA in June 2025, 13.8 percent at ENDO in July, and 13.8 percent with a different placebo-adjusted figure in a September press release. Enrolment is given as 125 in the abstracts against 126 on the registry. A result that moves between presentations is not yet a result. The company's website states NA-931 is in Phase 3. No Phase 3 trial for NA-931 is registered on ClinicalTrials.gov. The announcement traces to a single paid newswire release in January 2026, syndicated into around twenty local newspaper press-release sections, which reads like broad coverage but is one purchased placement. |
Frequently Asked Questions: Mazdutide vs NA-931
What is the difference between Mazdutide and NA-931?
Mazdutide is a weight loss peptide that mazdutide is a glp-1 and glucagon dual agonist, which puts it between semaglutide (glp-1 only) and retatrutide (glp-1, gip and glucagon). it is built on oxyntomodulin, a natural gut hormone that hits both receptors, rather than on a glp-1 backbone. it is furthest along in china, where it is approved for both weight management and type 2 diabetes. western approval has not happened. NA-931 is a weight loss peptide that na-931 (bioglutide) is cyclic glycine-proline, a two-amino-acid ring that occurs naturally as a breakdown product of igf-1. its developer, biomed industries, describes it as an oral once-daily agonist at four receptors at once - igf-1, glp-1, gip and glucagon - and has reported 13 to 15 percent weight loss in a 126-person phase 2 trial. those numbers have only ever appeared in conference abstracts, never in a peer-reviewed paper, and no trial results have been filed to clinicaltrials.gov. the same molecule is already sold as a consumer brain-health supplement and as a sigma-aldrich catalogue chemical, which makes it unusually cheap to source and unusually hard to verify. The main differences lie in their mechanisms of action and clinical applications.
Which is better, Mazdutide or NA-931?
Neither is universally "better" - the choice depends on your specific goals. Mazdutide is typically used for weight loss purposes, while NA-931 is used for weight loss. Always consult with a healthcare provider to determine which may be appropriate for your situation.
Can Mazdutide and NA-931 be used together?
Some peptide protocols combine multiple compounds for synergistic effects. However, using Mazdutide and NA-931 together should only be considered under medical supervision, as both compounds have their own side effect profiles and potential interactions. Research on their combined use may be limited.