What Is Retatrutide?
Retatrutide is the newest GLP-1 weight loss medication currently being studied in large clinical trials. It is described as a “triple agonist” because it mimics and activates three of your natural hormone receptors that impact the way your metabolism works.
- GLP-1, which helps control your appetite and slows down how fast your stomach empties.
- GIP, which enhances insulin function and the way your body metabolizes fat.
- Glucagon, which can increase energy expenditure and help your body burn fat more efficiently.
The addition of glucagon is what makes retatrutide different from most current weight loss injections. Glucagon helps your body release stored energy, so it may increase how many calories your body burns, even when you are at rest, and help convert fat that is currently being stored into fuel. Retatrutide appears to help you eat less and burn more energy at the same time, which could explain the higher weight loss seen in the trials to date. In phase 3 research, the participants taking the highest dose of retatrutide lost an average of about 28.7 percent of their body weight after about 68 weeks.
That is one of the highest weight loss results ever seen in a medication trial.
What Is Semaglutide?
Semaglutide is a well-known GLP-1 medication that has been used for diabetes and weight loss for several years. It is the active ingredient in drugs like Wegovy and Ozempic, and it works by mimicking a hormone your body makes naturally that helps to
- Reduce your appetite
- Slows down how fast you digest your food.
- Helps regulate blood sugar
In large studies, semaglutide helped people lose around 15 to 17 percent of their body weight on average at the highest approved dose. This level of weight loss was considered
That level of weight loss was considered unprecedented when it was first released and is still very effective compared to older weight loss medications.
Note: Semaglutide is the main ingredient in Wegovy and Ozempic, so when we compare retatrutide vs semaglutide, the data also applies to retatrutide vs Ozempic and retatrutide vs Wegovy.
| Retatrutide | Semaglutide | |
|---|---|---|
| Drug type | Triple hormone receptor agonist | GLP-1 receptor agonist |
| Hormones targeted | GLP-1, GIP, and glucagon | GLP-1 only |
| Average weight loss | Up to 28.7% in trials | 15 to 17% in trials |
| FDA approval | Not yet approved | FDA approved |
| Brand examples | None yet | Wegovy, Ozempic |
| Availability | Clinical trials only | Widely available |
| Long-term safety data | Limited so far | Extensive real-world data |
Retatrutide vs Semaglutide Weight Loss Results
The main reason anyone would be comparing any type of weight loss drug is to find which would offer the most weight loss potential.
Retatrutide
- Newer trials have shown average weight loss to be around 26 to 29 percent of total body weight.
- Some participants lost more than 25 percent of their total body weight.
- Phase 3 trial participants who weighed between 215 and 235 pounds lost an average of between 60 and 70 pounds in about 68 weeks.
- Weight loss results have been shown to be similar to what some people achieve with bariatric surgery.
Semaglutide
- Major trials demonstrated an average weight loss of between 15 and 17 percent of the participants’ starting weight over a 68-week time frame. Some higher-dose trials reported weight loss averages up to 20%.
- Trial participants who weighed between 230 and 265 pounds lost an average of between 35 and 45 pounds in 68 weeks.
- Many patients saw noticeable improvements in metabolic conditions like type 2 diabetes and high blood pressure.
- Results have been proven with millions of real-world users.
When comparing retatrutide vs semaglutide for weight loss, the current studies indicate that retatrutide produces significantly more weight loss than semaglutide.
Why Retatrutide May Work Better Than Semaglutide
The main difference comes down to the hormone pathways each drug impacts. Semaglutide only influences one hormone pathway and works mainly by helping you feel full sooner and eat less. Retatrutide influences three hormone pathways at the same time, and researchers believe it can:
- Help reduce your appetite.
- Increase your body’s fat-burning potential.
- Improve the efficiency of your metabolism.
- Reduce visceral fat.
Which One Is Safer When Comparing Retatrutide vs Semaglutide?
This is where semaglutide may have a big advantage right now because it has been around for years, is already FDA approved for both diabetes and weight loss, and researchers have had the time to gather large amounts of real-world data on millions of patients.
Retatrutide is still being studied and is not fully approved yet, so long-term safety data are very limited.
Both medications, similar to all other GLP-1 weight loss drugs, share similar common side effects, including:
- Nausea
- Diarrhea
- Vomiting
- Constipation
Some early data indicate that retatrutide may have slightly higher rates of certain side effects compared with semaglutide at higher doses because it mimics 3 different hormones and is more potent.
Until there is more research completed and available on retatrutide, semaglutide is more well-known and established, so it may be considered safer and more predictable for the time being.
Retatrutide vs Semaglutide Availability And FDA Approval
Another major difference between these two medications is that Retatrutide is still in clinical trials and has not been approved by the FDA for anyone to use unless they are participating in a research trial. The expected approval and release date is unclear, with some reports saying late 2026 or early 2027, while others say 2028.
Semaglutide has been approved by the FDA for the treatment of type 2 diabetes since 2017 and for weight loss since 2021, and is currently being prescribed by doctors around the world.
Which Works Faster Between Semaglutide vs Retatrutide?
Early data that has been recorded in the ongoing research indicates that retatrutide may lead to faster weight loss for some people. In some studies, participants reached significant weight loss milestones sooner when compared with semaglutide.
Semaglutide is proven to produce steady and predictable results when taken consistently and used alongside healthy lifestyle choices. Many users experience noticeable weight loss results within the first 3 to 6 months of starting semaglutide.
Who Might Be The Best Candidate for Each Between Semaglutide vs Retatrutide?
Semaglutide may be better for:
- People who want to start their weight loss journey now with an approved medication.
- Patients who prefer a well-studied option or are concerned about long-term safety data.
Retatrutide may eventually be better for:
- People with severe obesity.
- Patients who did not respond to semaglutide or other GLP-1 medications.
- People who need an option that offers more significant weight loss.
Should You Wait for Retatrutide?
Not necessarily. Waiting for retatrutide to become available may not make sense if you have weight-related health risks that are urgent.
If you want to start losing weight now, semaglutide is already available and can help you lose a significant amount of weight. Losing weight can improve your health and get you on the right track before your health condition becomes worse.
When retatrutide becomes available, you could always transition to this newer medication to continue your weight loss journey. This would be particularly helpful if you have reached a weight loss plateau or have not lost enough weight on semaglutide to reach your goals.
Dr. Angelina at IBI Wellnesscan help you choose the medication that would be best for you and your circumstances.
Where Can I Get Prescription Weight Loss Medication?
You can get legitimate doctor‑prescribed weight loss medication through IBI Wellness’s online program. After a quick virtual consultation with Dr. Angelina Postoev, you may qualify for medications like Wegovy, Zepbound, or Mounjaro, which can then be shipped to your home.
Dr. Angelina Postoev is a triple board-certified surgeon who leads the IBI Wellnessprogram and oversees every prescription. She has extensive experience treating patients with obesity and understands the complexities of medical weight loss. Dr. Angelina carefully evaluates each patient’s health and medical history to determine eligibility for prescription weight loss medication and guide them through their personalized, medically supervised plan.
Schedule your consultation today to learn more and to see if prescription weight loss medication is right for you.
FAQs
Can you take retatrutide and semaglutide together?
No. You should not take retatrutide and semaglutide together because both medications work by influencing similar hormone pathways. Combining these two medications would likely increase the risk of serious side effects like severe nausea, vomiting, pancreatitis, and dangerously low blood sugar without providing any additional benefits. Additionally, retatrutide is still in the trial phase, is not available to the general public yet, and we do not have enough safety data on this newer drug.
Who should not take retatrutide?
Since retatrutide is still in clinical trials and not yet FDA approved, we do not know the full picture, but based on what we know so far, the following people would not be good candidates:
- Individuals with a personal or family history of medullary thyroid cancer or MEN 2 (Multiple Endocrine Neoplasia syndrome type 2)
- Individuals with certain medical conditions, like pancreatitis. severe gastrointestinal disorders, severe kidney or liver disease. Or people with eating disorders such as anorexia or bulimia.
- Pregnant or breastfeeding women
- Children and teenagers (safety not established)
- People with a known allergy to retatrutide or any of its ingredients.
- People who are already taking other GLP-1 receptor agonists like semaglutide or liraglutide.
Is it okay to switch from semaglutide to retatrutide?
Yes, once retatrutide is approved by the FDA for use, it would likely not be a problem for most people to switch from semaglutide to retatrutide under the supervision of a doctor. Some people may find retatrutide to be a more effective option, since it targets three hormonal pathways in the body compared to only one with semaglutide. Doctor Angelina would help guide your transition, making sure the timing and dosing are done safely to minimize any side effects during the switch.
