Adipotide vs Retatrutide
A targeted fat-destroying peptide that works like a smart missile, cutting off blood supply to fat cells and causing rapid weight loss in primate studies.
The world's first triple-action weight loss peptide that simultaneously activates three hormone receptors—GIP, GLP-1, and glucagon—delivering unprecedented weight loss results of up to 24% body weight in clinical trials [1][2].
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Quick comparison
Dose range
Adipotide
mg/kg
Retatrutide
4–8 mg
Frequency
Adipotide
Once daily
Retatrutide
Once weekly
Administration
Adipotide
Subcutaneous injection
Retatrutide
Subcutaneous injection
Cycle length
Adipotide
4-6 weeks
Retatrutide
12+ weeks
Onset speed
Adipotide
Moderate (1-2 weeks)
Retatrutide
Moderate (1-2 weeks)
Evidence level
Adipotide
Strong preclinical (extensive animal studies)
Retatrutide
Moderate human trials (Phase 1-2)
Benefit ratings
Fat Elimination
Metabolic Improvement
Speed of Results
Weight Loss Power
Metabolic Health
Appetite Control
Compound specifications
Adipotide
Molecular formula
C111H206N36O28S2
Molecular weight
2611.41 g/mol
Half-life
~24 hours
Bioavailability
High (subcutaneous injection)
CAS number
859216-15-2
Retatrutide
Molecular formula
C221H342N46O68
Molecular weight
4731 g/mol
Half-life
~6 days (allows once-weekly dosing)
Bioavailability
High via subcutaneous injection
CAS number
2381089-83-2
Dosing compared
Adipotide
Subcutaneous
0.10 mg/kg
Once daily · About 2 weeks before stepping up
Adipotide is research-only and has never been approved for people. These numbers come from a dose-finding study in obese monkeys, where the dose was raised step by step every 2 weeks [2]. The first-in-man Phase 1 study started lower, at 0.03 mg/kg under the skin once daily for 28 days; it enrolled 4 people and was terminated without posting results [5].
0.25 mg/kg
Once daily · About 2 weeks at this step
Middle step in the rhesus macaque dose-finding study — not an approved or established human dose. Renal tubular degeneration with elevated creatinine was dose-dependent in those macaques, and this level sits at the point where that injury was observed. The mechanism makes it expected rather than incidental: adipotide is a homing sequence fused to a pro-apoptotic domain, and the kidney accumulates it. [2]
0.43 mg/kg
Once daily · Up to ~3-4 weeks at this level (studies ran 28 days at the top dose)
This was the best-working ("optimal") dose in obese monkeys, leading to about 10.6% body-weight loss over 28 days. It is from animal research and is not an approved or established human dose. [2]
Retatrutide
Subcutaneous
Weeks 1-4
2 mg
Once weekly · Weeks 1-4 (then escalate 2 mg every 4 weeks)
Phase 2 obesity trial initiated higher-dose arms at 2 mg weekly with stepwise 2 mg increases every 4 weeks to limit GI effects [1].
Maintenance after titration
4-8 mg
Once weekly · Maintenance after titration
Mid-range maintenance doses; 8 mg produced ~22% mean weight loss at 48 weeks in the phase 2 trial [1][3].
Maintenance (highest studied)
12 mg
Once weekly · Maintenance (highest studied)
Highest studied dose; produced ~24% mean weight reduction at 48 weeks [1]. Still investigational (not FDA-approved).
Best suited for
Adipotide
Targeted White Fat Reduction
Adipotide specifically seeks out and destroys the blood vessels feeding white adipose tissue. Unlike diet or exercise that shrink fat cells, this peptide actually eliminates fat tissue by cutting off its blood supply - a completely unique mechanism.
Stubborn Fat Deposits
Because it targets the vasculature of fat tissue directly, Adipotide may be particularly effective for stubborn fat deposits that resist traditional methods. The peptide homes in on prohibitin receptors found specifically on blood vessels supplying fat tissue.
Improving Insulin Resistance
Primate studies showed remarkable improvements in insulin sensitivity - treated monkeys used about 50% less insulin after treatment. This makes it interesting for research into obesity-related metabolic dysfunction.
Research Applications
As a pioneering vascular-targeting peptide, Adipotide represents a new class of potential therapeutics. Its unique mechanism of targeting specific tissue vasculature has implications beyond obesity research.
Retatrutide
Significant Obesity Management
If you need to lose a substantial amount of weight, retatrutide is showing unprecedented results. Phase 2 trials demonstrated average weight loss of 24% at the highest dose—that's nearly 60 pounds for someone weighing 250 lbs [1]. No other medication has matched this [1].
Type 2 Diabetes with Obesity
Retatrutide tackles both problems at once. It dramatically improves blood sugar control (HbA1c reductions of up to 2%) while delivering major weight loss [6]. The dual benefit makes it especially valuable for diabetics struggling with weight.
Metabolic Syndrome Warriors
If you're dealing with the cluster of issues that includes high blood sugar, excess belly fat, abnormal cholesterol, and high blood pressure, retatrutide's triple mechanism attacks multiple aspects of metabolic dysfunction simultaneously [5].
Fatty Liver Disease (MASLD)
Early research shows retatrutide may significantly reduce liver fat [7]. For people with non-alcoholic fatty liver disease, this peptide offers hope through weight loss plus direct metabolic improvements that benefit liver health.
Side effects
Adipotide
Common
- Elevated Serum Creatinine
- Proteinuria
- Glucosuria
- Reduced Appetite
Uncommon
- Mild Dehydration
- Injection Site Reactions
Serious
- Renal Tubular Dysfunction
Retatrutide
Common
- Nausea
- Diarrhea
- Constipation
- Decreased appetite
Uncommon
- Increased heart rate
- Injection site reactions
Serious
- Pancreatitis
- Gallbladder problems
Safety & evidence
Adipotide
Evidence level
Strong preclinical (extensive animal studies)
FDA status
Research compound
Safety overview
Everything known about adipotide's safety comes from animals. It has been given to mice [1], to mice and rats [4], and to obese monkeys of three different species [2]. The main safety finding is the kidneys. In the monkey study, the doses that worked best also produced changes in the function of the renal proximal tubule — the part of the kidney that reabsorbs what the body needs from filtered blood. Those changes were dose-dependent and they reversed after treatment stopped [2]. The selectivity claim comes from a direct comparison rather than an impression: the same peptide that completely reversed diet-induced obesity in mice on a high-fat diet did not reduce body weight in animals on a low-fat diet [4]. There is no human safety data. One first-in-man Phase 1 study opened in 2012 in men with metastatic prostate cancer and obesity. Four people were enrolled. It was terminated, the registry records the reason as the principal investigator's request rather than a safety finding, and no results have ever been posted [5].
Contraindications
- Kidney disease or impaired renal function
- Pregnancy or breastfeeding
- Active infections or compromised immune system
- History of severe allergic reactions to peptides
- Dehydration or conditions affecting fluid balance
Retatrutide
Evidence level
Moderate human trials (Phase 1-2)
FDA status
Research compound
Safety overview
Retatrutide has shown a generally favorable safety profile in Phase 1 and Phase 2 clinical trials involving over 600 participants [1][6]. Most side effects are gastrointestinal and tend to improve over time [3]. The medication appears well-tolerated when doses are increased gradually. No major safety signals have emerged, but larger Phase 3 trials are still ongoing [3].
Contraindications
- Personal or family history of medullary thyroid carcinoma (MTC)
- Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)
- Pregnancy or planning to become pregnant
- History of severe pancreatitis
- Known allergy to GLP-1 receptor agonists
Which is right for you?
Choose Adipotide if...
- Targeted fat reduction
- Improving insulin resistance
- Reducing stubborn white adipose tissue
- Research into vascular-targeted therapies
Choose Retatrutide if...
- Significant weight loss
- Type 2 diabetes management
- Metabolic health improvement
- Body composition optimization