Mazdutide
A once-weekly dual agonist that hits both the GLP-1 and the glucagon receptor. People run it for weight loss with an added metabolic angle, since the glucagon arm is studied for raising energy expenditure on top of the usual appetite suppression.
Where to buy Mazdutide, cheapest first.
Prices from 2 vendors across the market. We link straight to each vendor’s product page and grade vendors on public lab data, so you’re not just chasing the lowest number.
What Mazdutide actually does.
The simple version first, then a little more for the curious. No biochem degree required.
It acts on two receptors at once: the GLP-1 receptor curbs appetite and slows the stomach, while the glucagon receptor is studied for nudging the body to burn more energy, so weight comes off through both eating less and spending more.
How it works
Mazdutide is a single molecule that activates both the GLP-1 receptor and the glucagon receptor. The GLP-1 side reduces appetite, slows gastric emptying, and helps insulin response; the glucagon side is studied for increasing fat oxidation and energy expenditure.
Where it acts
It works through the gut-brain appetite circuits and the liver and metabolic tissues. The glucagon component is what sets it apart from pure GLP-1 drugs, since it is studied for raising metabolic rate rather than only cutting how much you eat.
What people notice
In trials, participants reported reduced appetite and steady weight loss over weeks to months, with the highest doses studied reaching roughly 18 to 20 percent body weight reduction. Effects build gradually as the dose is titrated up.
Honest caveat: the human data is real but comes almost entirely from manufacturer-run trials in Chinese adults, and mazdutide is approved only in China, not by the FDA or EMA. The peptide vendors we compare sell it strictly for research use only, not as a medicine. None of this is medical advice, talk to a licensed provider before starting anything.
How to take it.
Mazdutide is a once-weekly subcutaneous injection, given into the fat with a tiny insulin needle. It isn't an oral peptide, so the injectable form is what people run. The routine is below; for titration and timing, see the full guide.
Reconstitute the vial
Add bacteriostatic water down the side of the vial (a 10mg vial + 2mL = 5mg/mL). Let it dissolve. Swirl gently, don't shake.
Draw your dose
On a U-100 insulin syringe, pull to your unit mark. 3mg at 5mg/mL is 60 units (0.6mL). Use the calculator if you're unsure.
Pinch and inject
Swab with alcohol, pinch a bit of fat, insert at 45–90°, push slowly. Subcutaneous into the belly is simplest. Take the same dose on the same day each week.
Rotate your sites
Move to a different spot each time so no area gets sore or lumpy. Store the vial in the fridge between weekly doses.
The easiest spots are the belly (about 2 inches either side of the navel), the love handles, the front of the thigh, and the back of the upper arms. Rotate every injection.
Don't do the math, let the calculator do it.
This is Mazdutide's typical setup, already worked out. Change any value and the draw updates instantly.
Typical Mazdutide dose: a slow titration starting around 1.5 mg once a week, stepping up through 3 mg and 4.5 mg every few weeks to a maintenance dose of 4 to 6 mg weekly. Trials have gone as high as 9 mg. The slow ramp keeps nausea down.
Cycling Mazdutide.
Whether Mazdutide is cycled at all, how long people run it, and the honest reasoning behind it.
Titrated up to a maintenance dose, not cycled.
Unlike a healing peptide that runs in short blocks, mazdutide is more like the other GLP-1 type compounds: it is taken continuously while you titrate up and then hold at a maintenance dose. There is no built-in loading-then-stopping rhythm.
The thing to plan for is what happens when you stop. As with other GLP-1 drugs, appetite tends to return when the compound leaves, so weight can come back without lasting habit changes. That is a conversation for a licensed provider, not a forum.
- Hold each step until side effects settle before increasing the dose. The ramp up is the part to take slowly.
- Keep the same day each week so blood levels stay steady. Consistency matters more here than with some peptides because of the glucagon arm.
- Plan for stopping. Appetite returns when you come off, so think about the off-ramp before you start, ideally with a provider.
Want the full picture, on and off periods, the washout, stacking, and keeping your results? Read how peptide cycling works →
What's actually in the vial.
For one of these vendors we link the per-batch certificate itself, and the purity below is read straight off it. The rest link to the vendor's general lab-results page. We don't run the labs ourselves and we don't show a purity number unless it's printed on a certificate we link, so you can open the document and check it against the batch yourself.
| Vendor | Purity (per COA) | Batch / report | Certificate |
|---|---|---|---|
| Umbrella Labs | 99.8% | V260236-22 005 | View COA ↗ |
What people pair it with.
Mazdutide is usually run on its own as a complete dual agonist, but these are the combinations people in the weight-loss space discuss.
Appetite & satiety
Pairs the GLP-1 and glucagon dual agonist with an amylin analog. The two work through different appetite pathways, an approach mirrored by the cagrilintide plus semaglutide combinations now in trials.
View stack →Comfort & gut
Some people add BPC-157 to ease the gut side effects that come with GLP-1 type compounds. It is run for the gut lining rather than for weight loss itself.
View stack →Standalone dual agonist
The most common approach. Because mazdutide already covers two receptors, many people run it alone and simply titrate the dose rather than stacking anything on top.
View stack →In the same corner.
Other weight and metabolic peptides people compare against Mazdutide.
Questions, answered straight.
Is Mazdutide legal?
Mazdutide is approved as a medicine only in China, and it is not approved by the FDA or EMA. The vendors we compare sell it strictly for research use only, not for human use. It is not currently on WADA's prohibited list, though WADA added GLP-1 drugs to its monitoring list, so competing athletes should stay aware. Rules vary by country, so check what applies where you are.
What does research use only actually mean?
It means the product is sold for laboratory and research purposes, not as a supplement or medicine for people. It has not been reviewed or approved for human use by the FDA. We aggregate prices and public lab data so you can see the landscape; what you do with that is between you and a licensed provider.
How is it different from Tirzepatide or Retatrutide?
All are next-generation weight compounds, but the receptors differ. Tirzepatide hits GLP-1 and GIP. Mazdutide hits GLP-1 and glucagon, and that glucagon arm is studied for raising energy expenditure. Retatrutide is a triple agonist that adds GIP on top, with the largest weight-loss figures in trials.
How do I store it?
Keep the sealed, freeze-dried vial frozen or refrigerated and out of light. Once you mix it with bacteriostatic water, store it refrigerated and use it within about four weeks. Don't freeze a reconstituted vial or put it through freeze-thaw cycles.
How is it dosed?
It is titrated slowly. A common pattern starts around 1.5 mg once a week and steps up through 3 mg and 4.5 mg every few weeks to a 4 to 6 mg maintenance dose, with trials going to 9 mg. The slow ramp is what keeps nausea manageable. Use the calculator to turn your vial and dose into exact units.