How do I know what to believe online?

Looking for health information on the internet is a bit like trying to take a sip of water from a firehose. It is loud, overwhelming, and you might end up more confused than when you started.

When you are looking into peptides, the stakes feel a bit higher. You want the facts, not the hype. Here is how we sort through the data provided by researchers and regulators to help you understand what is actually happening in your body.

What do these letter grades mean?

We use a grading system to show how much solid proof exists for a specific peptide. It is like a report card for science.

• Grade A+: This is the gold standard. For example, semaglutide and tirzepatide both have this grade. It means there are massive, high-quality studies showing they work for things like weight loss and heart health.
• Grade A: Very strong evidence. Tesamorelin has this grade because it has been proven to reduce deep belly fat in specific medical cases.
• Grade A-: The evidence is good, but there might be a catch. Thymosin Alpha-1 has this grade because while it is used in over 35 countries, it is not currently FDA-approved.

Is it actually approved by the government?

Just because people are talking about a peptide does not mean the FDA has given it the green light for every use.

For instance, semaglutide is FDA-approved under brand names like Wegovy and Ozempic. Tirzepatide is approved as Zepbound and Mounjaro. These are used to help with weight loss by slowing down how fast your stomach empties and making your brain feel less hungry.

Then there are peptides like tesamorelin, which is FDA-approved, but only for a very specific condition called HIV-associated lipodystrophy (a specific way the body stores fat). Using it for general fat loss is considered "off-label," and scientists are still working on that one—turns out the human body is complicated. Who knew?

What are the experts still worried about?

Even the best-studied peptides have "evidence gaps." This is a fancy way of saying there are things we still do not know.

• The Rebound: With semaglutide, studies show that weight regain after stopping the medication is substantial.
• Muscle Loss: There are concerns that people might lose too much muscle mass while losing weight on these medications.
• Side Effects: Nausea is very common, affecting about 44% of people taking semaglutide.
• Long-term Data: For newer options like tirzepatide, big trials looking at long-term heart outcomes are still ongoing.

How to take the next step

This content is sourced exclusively from TruthTides clinical reference data and does not constitute medical advice.

If you are feeling overwhelmed by the data, this is a great one to bring up with your doctor. They can help you figure out if these options make sense for your specific health history. You can find peptide-experienced physicians in our Find a Doctor directory.

When you are ready to talk to a professional, you can search for a reputable peptide therapy clinic to discuss your goals safely.

• Always check the regulatory status
• Look for mention of specific clinical trials
• Be wary of anything that claims to have no side effects