You are probably hearing more and more about peptides for weight loss. But if you are one of the millions of Americans who struggle with weight, you know that losing fat is not always so easy.
The statistics reveal that more than 40% of American adults are obese. And we know that up to 80% of people who diet will regain their weight in the following year.
When hormones and other metabolic functions become resistant, dieting and exercise are not enough. This is where peptides come in. Peptides are simply small strands of amino acids that serve as the messengers in your body, directing your cells to function
What Are Peptides?
First, let’s understand what they are. Peptides are short amino acid chains. Amino acids are what make up proteins. There are hundreds of different peptides in your body, and they all act as signals. Some help regulate your blood sugar, and others are appetite suppressants.
But don’t confuse peptides with huge protein powders. Peptides are much smaller. When we are referring to medical treatment, we are referring to artificially produced versions of these natural body messengers that will target your specific body processes. The most common peptides for weight loss are GLP-1 medications like Ozempic.
Most weight loss peptides, particularly new ones, function in 3 ways:
- Suppress your appetite
- Slow digestion
- Manage your insulin & metabolism
This is why fat loss peptides are now being used to treat obesity.
The Best Peptides for Weight Loss
The safest weight loss peptides are those that have been extensively researched for years and approved by most major insurance companies:
- GLP-1 Receptor Agonists
- Dual & Triple Agonist Peptides
1. GLP-1 Receptor Agonists
This is the most common peptide used by many. It is a hormone that slows digestion and makes you feel full. It works extremely well and is FDA-approved to treat diabetes and obesity.
A few of its examples are:
Semaglutide (Wegovy / Ozempic / Rybelsus)
Semaglutide is considered the best GLP-1 peptide for weight loss. This is a once-weekly injection that strongly activates the GLP-1 receptor to curb hunger, delay gastric emptying, and regulate your blood glucose levels.
In a clinical trial, weekly injections of semaglutide 2.4 mg led to an average weight loss of 14.9% after 68 weeks. Over 86% lost at least 5% of their body weight.
Its FDA-approved medications are:
- Wegovy: It is FDA-approved for chronic weight management in adults with obesity (BMI ≥ 30) or overweight (BMI ≥ 27) with at least one weight-related condition
- Ozempic: It is FDA-approved for the treatment of type 2 diabetes
- Rybelsus: This is an oral semaglutide for type 2 diabetes and weight management
Its side effects include nausea, vomiting, diarrhea, constipation, and abdominal pain, which resolve with time. T
There is a Black box warning about the potential for thyroid tumors. Do not use if you have a family or personal history of medullary thyroid carcinoma.
Liraglutide (Saxenda, Victoza)
This is one of the first and best studied GLP-1 peptides. It’s approved by the FDA for weight loss (Saxenda) and for Type 2 diabetes (Victoza). It slows down digestion and suppresses your appetite.
But you should be aware that liraglutide is shorter-acting and so needs to be injected every day.
It’s probably more suitable for people who require moderate weight loss and can’t tolerate weekly peptides.
But these days, semaglutide has replaced liraglutide as a more effective and easier once-weekly dose.
2. Dual & Triple Agonist Peptides
These are the latest, most sophisticated types of metabolic drugs. While GLP-1 peptides only mimic one hormone, these drugs simultaneously mimic two or three hormones to send a more potent signal to your metabolism. Some of its examples include:
Tirzepatide (Mounjaro, Zepbound)
Tirzepatide is a dual agonist. It acts like the GLP-1 hormone and the GIP hormone. And because it’s a dual hormone, the data show that tirzepatide can help patients lose up to 20% to 25% of their body weight.
Many physicians believe tirzepatide is now the best peptide for weight loss that is available. It is particularly for patients who are severely insulin-resistant.
Retatrutide Triple Agonists
You may hear about new drugs that copy three hormones, such as GLP-1, GIP, and Glucagon.
The glucagon is believed to help burn fat cells specifically. Retatrutide is not FDA-approved yet. It is undergoing Phase 3 clinical trials for several indications. A drug application to the FDA has not yet been filed. So, they are generally not available in primary care clinics and are not covered by insurance.
3 Less Proven Fat Loss Peptides
There are some peptides that are heavily promoted by med spas and online health clinics, but be very careful. The evidence for these fat loss peptides is quite limited; they are not FDA-approved for weight loss and are not covered by insurance.
CJC-1295 / Ipamorelin
These are growth hormone secretagogues. They are claimed to burn fat as they trigger your body to produce more human growth hormone (HGH). They are also occasionally used in sports medicine to increase lean muscle mass.
But the evidence that they burn lots of fat is minimal and needs proper studies. You shouldn’t take them for weight loss.
This could potentially stimulate latent cancer cells. It may also cause other potential issues, including hormone imbalances, water retention, joint pain, and altered insulin response. These medications are not approved by the FDA for weight loss.
AOD-9604
This is a shortened version of the human growth hormone. It is aggressively promoted as a fat-loss peptide that selectively acts on fat cells, but not on blood sugar.
It has performed well in some initial animal and small human studies. But when tested in larger human trials, the results weren’t consistent, and AOD-9604 did not consistently cause weight loss in humans.
The FDA has explicitly stated it is not an approved weight loss treatment.
Tesamorelin
This is a special type of peptide that is FDA-approved, but not for weight loss. It’s approved for the condition of HIV-associated lipodystrophy. This is where patients get abnormal, dangerous visceral fat in their belly as a result of their medications.
Tesamorelin is a great drug to lose that particular belly fat, but it is not a weight-loss medication.
If you do not have HIV-associated lipodystrophy, you should not go for tesamorelin. It doesn’t mean it is not safe, but if you are using it off-label, you need to discuss this with your doctor.
Peptides vs. Diet and Exercise
Many people wonder why they should take a drug when they can diet and exercise. You should think of these peptides not as a substitute for a healthy diet and exercise, but as a way to restore your biology to make diet and exercise more effective.
When you diet to lose weight, your body goes into fight or flight. So it slows down your metabolism and eats your muscles. That’s why your weight will bounce back as soon as you stop dieting.
If you use the best peptides for weight loss with a doctor, your body changes. Your blood sugar is normalized, and your appetite is naturally suppressed, so you are eating less.
More importantly, clinical studies demonstrate that these drugs are able to help you keep your muscle mass while you reduce your fat.
Are They Safe?
GLP-1 drugs such as semaglutide and tirzepatide are primarily used for weight loss. They are safe when used appropriately. In fact, they are approved for weight loss and metabolic diseases based on strong safety and efficacy data.
The most frequent side effects are gastrointestinal, including nausea, bloating, diarrhea, or constipation. These typically occur early and resolve with time. There are also serious but rare side effects. These include pancreatitis, gallbladder problems, and potential thyroid problems in animal studies.
Another aspect that is often overlooked is long-term effects. The current evidence is that the peptides work while you use them, but people will regain weight when they stop.
So, if you are looking for peptides for weight loss, it is best that you only use FDA-approved peptides with a licensed medical practitioner who can oversee your blood work.
Who Should Use Peptides for Weight Loss?
Peptides for weight loss are generally recommended in more specific circumstances, including:
- You have a BMI over 30
- You have a BMI over 27, with conditions such as diabetes, hypertension, or insulin resistance
- You’ve made a serious effort at diet and exercise, but aren’t losing weight
- You have trouble with excessive hunger or cravings
- Your doctor suggests it as a treatment
Conclusion
Weight management is an important aspect of preventing chronic diseases such as cardiovascular attacks, stroke, and severe diabetes.
Peptides for weight loss can be life-altering, as long as you do it safely. It’s always important to put your safety first by using FDA-approved drugs and consulting a medical professional who can manage your health over time.
If you are sick of being overweight and want to try an evidence-based treatment, you should talk to a doctor. Ask your provider at your next appointment:
- Is the peptide I am taking FDA-approved?
- Are you going to test my liver and kidney function?
- Will you get prior authorization for my insurance?
- How are we going to titrate my dose up?
At Kairos Integrative Care, one of our nurse practitioners, Lola, walks you through this process. She offers evidence-based treatment for chronic disease and prescribes you safe, FDA-approved peptides for your health goals.
We see patients in Houston, Sugar Land, Richmond, and nearby areas (77046 & 77478) and accept major insurance plans, including Blue Cross, Aetna, Ambetter, Cigna, and more.
New patients are always welcome, and if coming into the clinic isn’t possible, telemedicine appointments are available across Texas.
