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Pemvidutide

ALT-801

Metabolic & Fat LossInjectable📊 Correlative data

Pemvidutide (ALT-801) is a metabolic & fat loss research compound. GLP-1/glucagon dual agonist — glucagon arm drives energy expenditure and hepatic fat loss on top of GLP-1 appetite control.

Research & educational use only. The information below summarizes published research and mechanisms. It is not medical advice or a recommendation for human use. The protocol that uses it — dosing, sequence and what to retest — is inside Skool ($10/mo).

Pemvidutide quick facts

Reported research dose1.2mg-2.4mg
RouteSubq
Frequency1x Weekly
Half-life~Weekly dosing
FormsInjectable
Evidence levelPhase 2 human (~15.6% at 2.4mg)
Coach Cam’s take

Strong body-comp and liver data. Same dual logic as survo/mazdutide.

How Pemvidutide works

GLP-1/glucagon dual agonist — glucagon arm drives energy expenditure and hepatic fat loss on top of GLP-1 appetite control.

Proposed benefits

Researched for fat oxidation, appetite and energy regulation, insulin sensitivity and endurance capacity.

Where to get Pemvidutide

See vetted vendors for Pemvidutide →

Bacteriostatic water is the diluent — sterile water with 0.9% benzyl alcohol, which is what lets a vial be drawn from more than once. It does not come with the vial, and unlike the compound it is bought again every time.

Need bacteriostatic water? Get it at AminoWell USA (my company) → Code CAMERON.

The evidence for Pemvidutide

Graded by what exists behind each claim.

✅ Clinically validated

📊 Correlative data

🧪 Theoretical / extrapolated

How to read these tiers: they say how much human evidence exists, not how well something works — and ✗ flags harm, never a disappointing trial. How the evidence tiers work →

What Pemvidutide actually does

The first thing to fix is which drug this is. Pemvidutide is sold on this site as a weight-loss compound, and the entire peer-reviewed record for it is liver: three randomized trials, all in fatty liver disease, two of them with a biopsy or an MRI endpoint Harrison 2024 Browne 2025 Noureddin 2025. The obesity phase 2 that everybody quotes — the 15.6% figure on the card — has no primary publication in the indexed literature. It exists as a company presentation. That does not make it false; it makes it a different tier of evidence from the three liver trials, and no page anywhere draws the distinction.

The mechanism: GLP-1 plus glucagon, and the glucagon arm is the whole point. A GLP-1 receptor agonist reduces intake. A glucagon receptor agonist increases expenditure and, specifically, drives hepatic fat oxidation — the liver burns its own stored triglyceride. Those are two different levers on the same scale, and combining them is why a dual can outperform a single at a matched GLP-1 exposure.

The ratio, and what is actually published about it. This site’s card states a 1:1 GLP-1-to-glucagon ratio and calls it the design thesis, which is a fair summary of the developer’s public position. It is worth being exact about where that number comes from: none of the three published trials prints a receptor potency ratio Harrison 2024 Browne 2025 Noureddin 2025. For a molecule whose entire differentiation is its glucagon weighting, the defining number is not in the peer-reviewed record. That is not unique to this compound — it is true of every multi-agonist in this cohort — but it is most conspicuous here, because here the ratio is the marketing.

The evidence that the glucagon arm is real does not come from a ratio. It comes from the liver. At 12 weeks, relative liver-fat reduction was 46.6% at 1.2 mg, 68.5% at 1.8 mg and 57.1% at 2.4 mg, against 4.4% on placebo, p < 0.001 Harrison 2024. A GLP-1 alone does not do that in 12 weeks at 6% body-weight loss. Something is oxidizing hepatic fat faster than the weight is coming off, and glucagon receptor agonism is the available explanation.

Now look at those three numbers again, because they are not monotonic. 46.6, then 68.5, then 57.1. The middle dose beat the top dose. The same paper reports that weight loss, alanine aminotransferase and corrected cT1 all reached their maximum at 1.8 mg rather than at 2.4 mg Harrison 2024. Four separate readouts peaked at the middle dose. That is either small-group noise in a 94-person trial with four arms, or it is a genuine inverted-U — and there is a mechanistic story for the second: past some threshold the glucagon arm’s effect on hepatic glucose output and on appetite-independent metabolic stress may start to cost more than the extra fat oxidation buys. The developers appear to have taken it seriously: the pivotal 48-week MASH trial dropped 2.4 mg entirely and ran 1.2 and 1.8 mg Noureddin 2025. The site’s dose card still tops out at 2.4 mg, which is the dose the sponsor stopped using.

Cell, rodent, human — and where it stops

Step one, in cells and in animals: not published under this name. No discovery paper, no receptor-activation assay and no rodent study for pemvidutide appears in the indexed literature. That is a genuine hole. Every other compound in this cohort with phase 2 or phase 3 data also has a discovery paper describing what it does to a receptor; this one starts at humans.

Step two, humans, 12 weeks, liver fat by MRI. 94 participants with BMI ≥ 28.0 kg/m2 and liver fat content ≥ 10%, randomized to pemvidutide 1.2, 1.8 or 2.4 mg or placebo weekly for 12 weeks (NCT05006885). Relative liver-fat reductions 46.6%, 68.5% and 57.1% versus 4.4% on placebo, p < 0.001. At 1.8 mg, 94.4% of participants achieved a ≥ 30% liver-fat reduction and 55.6% reached normalization at ≤ 5% liver fat Harrison 2024.

Step three, the same people carried to 24 weeks. 64 completers continued their original doses (NCT05292911). Baseline mean BMI 36.7 kg/m2, liver fat 22.2%, 26.6% with type 2 diabetes. At 24 weeks the relative liver-fat reductions were 56.3%, 75.2% and 76.4% against 14.0% on placebo, p < 0.001; at 1.8 mg, 84.6% achieved a ≥ 50% reduction and 53.8% normalized. Body weight fell 6.2% over the 24 weeks, p < 0.001 Browne 2025. Two things worth noticing: the placebo arm’s liver fat fell 14% by itself, which is what trial participation does and is why uncontrolled liver-fat anecdotes are worthless; and the non-monotonicity resolved by 24 weeks, with 1.8 and 2.4 mg landing together.

Step four, the pivotal trial — and this is where the page earns its keep. IMPACT: 48-week, double-blind, phase 2b, biopsy-confirmed MASH with F2/F3 fibrosis, 83 sites across the USA and Australia, 212 randomized (NCT05989711). The published 24-week results carry two primary endpoints, and the drug met one and missed the other.

Met. MASH resolution without worsening of fibrosis: 20.9% on placebo (18 patients), 58.5% at 1.2 mg (24 patients; difference 38%, 95% CI 21–56; p < 0.0001) and 52.9% at 1.8 mg (45 patients; difference 32%, 95% CI 19–46; p < 0.0001) Noureddin 2025.

Missed. Fibrosis improvement without worsening of MASH: 27.9% on placebo (24 patients), 31.7% at 1.2 mg (p = 0.59) and 35.3% at 1.8 mg (p = 0.27) Noureddin 2025. Neither dose separated from placebo.

That pair of results is the most informative thing about this drug, and it is the thing nobody quotes. Read together they say: pemvidutide clears the inflammation and the fat — the steatohepatitis — decisively and at both doses, and over 24 weeks it does not measurably reverse the scar. Those are different biology. Fat clears in weeks; collagen turns over in months to years. So the honest reading is not ‘the drug failed’ — it is that a 24-week readout is short for a fibrosis endpoint and that the fibrosis question is still open at 48 weeks.

The obstacles, named one at a time. (1) Everything above is liver, and this compound is bought for weight. The largest published weight number is 6.2% at 24 weeks Browne 2025, in people selected for liver fat rather than for obesity. The 15.6% figure on the card comes from an obesity trial with no primary publication. (2) The lean-mass claim is unpublished. ‘Roughly 75% of the loss was fat mass’ is a company statement; no indexed pemvidutide paper reports body composition. (3) No cardiovascular outcome data and no phase 3 readout. (4) No head-to-head against a GLP-1, a GIP/GLP-1 dual or the triple agonist whose liver numbers are larger — retatrutide cut liver fat 81.4% at 8 mg by 24 weeks Sanyal 2024, against pemvidutide’s 75.2% at 1.8 mg over the same interval, in different populations and different trials, which is exactly why the comparison needs running rather than asserting.

Pemvidutide pharmacokinetics — how much of it actually gets in

The catalog says ‘~Weekly dosing’. That is a schedule, and no published pemvidutide half-life exists to replace it. None of the three trials reports a terminal half-life, a Cmax or an AUC Harrison 2024 Browne 2025 Noureddin 2025. So this section is a bound, built from what the molecule has to be doing.

What holds it in the body. A once-weekly peptide in this class survives by reversible albumin binding through a lipid side chain: bound drug is too large for glomerular filtration and is shielded from circulating peptidases, and the free fraction is topped up continuously from that depot Muller 2022. The dosing interval is the evidence — a peptide without that modification cannot be given weekly at all.

What degrades it. Once free of albumin, proteolysis by plasma and tissue peptidases, plus renal handling of the unbound fraction. Not a cytochrome substrate, which is why this class carries no CYP-interaction list; the one such study performed anywhere in this cohort found a sibling compound changed rosuvastatin exposure by 6% and digoxin exposure by 16%, both inside the range that gets called no interaction Li 2026.

The number, borrowed and labeled as borrowed. The only measured half-life in this cohort belongs to ecnoglutide: 124 to 138 hours at steady state, 5.2 to 5.8 days Guo 2023. Any weekly acylated incretin sits near there, which puts steady state at roughly 4 to 5 weekly doses — about a month. That single number reframes the trial data: the 12-week readout Harrison 2024 captured roughly 8 weeks at steady state, not 12, and the non-monotonic dose response sits inside that shorter window. By 24 weeks Browne 2025 the same doses had 20 weeks at steady state and the anomaly had resolved. That is not proof, but it is the cheapest available explanation and it can be checked by anyone who plots the two papers together.

The oral barrier. Absolute. Gastric acid, pancreatic proteases, brush-border peptidases, then hepatic first-pass extraction for anything that crosses. No oral pemvidutide exists and none is described.

The injectable comparator. Every human dose in every published trial was subcutaneous, once weekly, at 1.2, 1.8 or 2.4 mg. Note that the pivotal MASH trial ran only 1.2 and 1.8 mg Noureddin 2025: the top of the site’s dose range is a dose the sponsor stopped taking forward.

What would have to be true, and how you would know it was not

Four predictions. The second one cuts against the compound, and the third is the one that would settle the argument this drug is actually in.

1. ALT should fall, early, and out of proportion to the weight lost. Alanine aminotransferase improved maximally at 1.8 mg in the 12-week trial Harrison 2024, and the 24-week extension took liver fat down 75.2% while body weight fell only 6.2% Browne 2025. That ratio is the glucagon arm’s fingerprint. Draw a CMP at baseline, 6 weeks and 12 weeks and watch ALT. The prediction that distinguishes this drug from a plain GLP-1 is that ALT falls faster than the scale does. If ALT tracks weight one-for-one, the glucagon arm is not contributing what the design claims.

2. Resting heart rate should rise, and this is the cost side of the glucagon arm. Heart-rate elevation is a measured, meta-analyzed consequence of incretin agonism Yang 2023, and adding glucagon adds to it. Seated resting pulse, every morning before caffeine, for a week before starting and weekly after. This is the prediction that argues against the product: the same receptor that produces the liver result produces the tachycardia, and no formulation change separates them.

3. Fasting glucose and HbA1c, watched for the wrong direction. Glucagon raises hepatic glucose output; GLP-1 suppresses it. A deliberately glucagon-heavy ratio is exactly the design in which that balance could tip. 26.6% of the 24-week cohort had type 2 diabetes Browne 2025, so the question has been asked in a small way and never isolated. Draw HbA1c and fasting insulin at baseline, 12 and 24 weeks. Weight falling with fasting glucose rising is a ratio problem, and it is visible on a standard panel.

4. Lean mass will not be spared, and the 75% claim needs a scan. Across weight-loss pharmacotherapy more than 25% of total weight lost comes from fat-free mass Stefanakis 2024. The company’s 75%-fat-mass figure would be a genuine outlier if replicated, and no indexed pemvidutide paper reports body composition at all. Measure grip strength at baseline, 12 and 24 weeks, and a DXA if you can get one. Grip falling with weight is the failure this compound is specifically marketed as avoiding, which makes it the one worth measuring here.

What nobody has tested yet

Four things nobody has tested, and the first one is not exotic at all.

1. Nobody has published what this molecule does to a receptor. There is no discovery paper, no cAMP EC50, no binding constant and no potency ratio in the indexed literature for pemvidutide. The 1:1 ratio that is the entire commercial thesis has never appeared in a peer-reviewed publication. A single receptor-activation panel would move this compound from ‘claimed ratio’ to ‘measured ratio’ and would let it be compared with mazdutide, survodutide and retatrutide on the axis that actually differentiates them.

2. Whether the fibrosis endpoint moves at 48 weeks. The published IMPACT readout is 24 weeks, and fibrosis did not separate from placebo at either dose Noureddin 2025. The trial runs to 48. Collagen turnover is slower than fat turnover, so a null at 24 weeks and a positive at 48 is a live possibility rather than special pleading — and it is the single result that decides whether this is a liver drug or a liver-fat drug.

3. Whether the inverted-U at 12 weeks is real. Liver fat, weight, ALT and cT1 all peaked at 1.8 mg rather than 2.4 mg in the same trial Harrison 2024, and the sponsor subsequently dropped 2.4 mg Noureddin 2025. Nobody has run 1.8 versus 2.4 mg to steady state with liver fat as the primary endpoint, which is the experiment that would separate ‘noise in a 94-person study’ from ‘a genuine ceiling on glucagon agonism’. It is one of the more interesting unrun experiments in this class, because a real ceiling would apply to every glucagon-containing molecule and not just this one.

4. Whether the liver effect survives weight-matching. No trial has compared pemvidutide against a diet arm producing the same weight loss. Until that exists, the split between ‘glucagon-driven hepatic fat oxidation’ and ‘what happens to any liver when the person loses 6% of their weight’ is an assumption. The 24-week data makes the assumption look reasonable — 75.2% liver fat against 6.2% weight Browne 2025 is a very steep ratio — but reasonable is not measured.

Pemvidutide — its own safety story, not its class's

The class block on this page is written for GLP-1 receptor agonists. This molecule has a second receptor, and the second receptor carries most of what is specific here.

1. What the trials actually reported, stated plainly. In the 48-week MASH trial, adverse events occurred in 78–81% of treatment groups against 67% on placebo, predominantly mild to moderate, and discontinuations for adverse events were none at 1.2 mg, one (1.2%) at 1.8 mg and two (2.3%) on placebo Noureddin 2025. More people stopped placebo than stopped the top dose. That is an unusually clean tolerability signal for this class and it deserves saying as loudly as the risks.

2. Heart rate is the glucagon-specific risk. Incretin agonism raises heart rate as a measured class effect Yang 2023, and a deliberately glucagon-weighted molecule has more of the receptor that drives it. This is not a titration artifact that fades; the retatrutide phase 2 showed the rise building over months before declining Sanyal 2024. A resting pulse is free and nobody takes one.

3. Hepatic glucose output, which is the risk that runs opposite to expectation. People take this for a fatty liver and for weight. Glucagon receptor agonism raises hepatic glucose production, and the GLP-1 arm is what keeps that from showing up as hyperglycemia. In someone on insulin or a sulfonylurea, the interaction is bidirectional and the ratio governing it has never been published.

4. Gallbladder disease, sized properly. Across 76 randomized trials and 103,371 patients, GLP-1 receptor agonist use carried a relative risk of gallbladder or biliary disease of 1.37 (95% CI 1.23–1.52), rising to 2.29 (1.64–3.18) in weight-loss trials and increasing with dose and duration He 2022. Rapid hepatic fat mobilization is exactly the physiology that concentrates bile. Right upper quadrant pain after meals is the symptom.

5. The honest limit of the safety record. The published safety database for pemvidutide is roughly 370 people across three trials, the longest of which reports 24 weeks Harrison 2024 Browne 2025 Noureddin 2025. There is no cardiovascular outcome trial, no pregnancy data, no long-term registry and no post-marketing surveillance, because there is no market. Anything said about years of use is extrapolation from a 24-week record.

Sources read for this page

Pemvidutide — safety, predicted from mechanism

Predicted from mechanism, not from a human safety trial. How that reasoning works →

What the mechanism predicts

Derived from the molecule, not a trial.

What has actually been reported

How to reduce the risk

Same mechanism as the prediction.

What it does to your bloodwork

A fact about the assay.

Don't run this if

The honest unknown

Not medical advice. If you take prescription medication or have a diagnosed condition, check this with a pharmacist or doctor.

Pemvidutide — interference & stacking

Predicted from mechanism, not from an interaction study. How mechanism-predicted claims are made →

What Pemvidutide moves on your bloodwork

Expected direction, not a measured one.

The pattern with this class is that the frightening-looking numbers (lipase) are usually fine and the boring ones (ferritin, B12) are where the real damage happens.

🔒
The dose is the easy part. Making Pemvidutide actually work is what's behind Skool:
Running it
  • How to work up to it, and when not to
  • When to take it, and why that window
  • Cycle length
  • Time off between cycles
  • Fasted or fed, and when in the day
  • Needle gauge and injection site
  • Coach Cam's personal notes
Stacking it
  • Which compounds push the same lever, and why the dose adds up faster than people count
  • What blunts it — the stacks that waste your money
  • What compounds the risk, so a side effect arrives sooner than any one of them suggests
  • Coach Cam's read on running it alongside the rest of your protocol

Everything above is free and stays free. Skool is where it becomes a plan — Pemvidutide in an order, with the rest of what you're running.

Unlock in Skool — $10/mo →

Bloodwork to run alongside Pemvidutide

Baseline first, then again at 8–12 weeks.

MarkerWhat it’s watching for
HbA1c (Hemoglobin A1c)Where you started, so you can prove the change was real
Fasting InsulinMoves years before HbA1c does — the earliest signal you get
Lipid Panel (Cholesterol, HDL, LDL, Triglycerides)Rapid fat loss shifts triglycerides fast, in both directions
Comprehensive Metabolic Panel (CMP)Liver, kidney and electrolytes while intake is restricted

The Metabolic Health & Prediabetes panel covers these in one order — 8 markers, $81.45 with the discount applied.

Check results you already have → · All 103 markers A–Z

Pemvidutide — frequently asked questions

What is Pemvidutide?

Pemvidutide (ALT-801) is a metabolic & fat loss research compound. GLP-1/glucagon dual agonist — glucagon arm drives energy expenditure and hepatic fat loss on top of GLP-1 appetite control.

Is the full Pemvidutide protocol on this page?

The reported research dose is on this page, along with how Pemvidutide works and the evidence behind it. The protocol — how to work up to it, frequency, cycle length, time off, what not to stack it with and Coach Cam's notes — is inside Skool.

What is the half-life of Pemvidutide?

Pemvidutide has an approximate half-life of ~Weekly dosing, which is part of what determines how often it's dosed.

What's the evidence behind Pemvidutide?

Current evidence level: Phase 2 human (~15.6% at 2.4mg). Pemvidutide is offered for research purposes only and is not an approved medicine.

What Pemvidutide is used for

Pemvidutide appears under 2 goals in the goal router.

🔥 Lose fatAppetite & satiety signaling📉 Metabolic health & insulin sensitivityIncretin & satiety signaling📉 Metabolic health & insulin sensitivityHepatic fat & fatty liver

Where this goes next

Go deeper$10/mo

The pages here are the frameworks. The protocols — the dosing, the order to correct things in, the week-by-week schedule and what to retest — are inside Skool.

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