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RFK Jr. testifies on vaccines, budget cuts
On Thursday, Health and Human Services Secretary Robert F. Kennedy Jr. testified before the House Ways and Means Committee. LiveNOW from FOX's Ryan Schmelz spoke with Former Congressman and Physician, Dr. Michael Burgess, to break down the key moments.
The Food and Drug Administration will soon consider easing restrictions on peptide injections, the popular, unproven therapies touted by wellness influencers like Joe Rogan and Health Secretary Robert F. Kennedy Jr.
Peptides are often pitched as a quick way to build muscle, heal injuries, reduce inflammation or appear younger, but many have never been approved for human use and much of their evidence comes from studies in rats. Here’s what to know:
What are peptides?
Big picture view:
Peptides are short chains of amino acids in the body that perform essential functions. Dr. Melinda Ring, director of the Osher Center for Integrative Health at Northwestern University Feinberg School of Medicine, said the body naturally produces thousands of peptides, regulating "everything from hormone signaling to immune response and tissue repair."
"And it does so through tightly controlled feedback mechanisms, in precise amounts," she explained.
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Examples of FDA-approved peptide therapies include insulin for people with diabetes and GLP-1 medications for weight loss.
How are ‘wellness’ peptides different?
Dig deeper:
The peptides sold in wellness clinics and by influencers online "are a different story entirely," Ring said.
"They’re typically synthetic compounds manufactured outside FDA oversight, often by compounding pharmacies, and administered at doses far exceeding what the body would naturally produce," Ring said.
Popular peptide therapies could soon get a boost from the Food and Drug Administration (Getty Images)
Ring said some of the more popular peptides, like BPC-157, TB-500, CJC-1295 and ipamorelin, operate in a "gray market" with little oversight.
Several peptides, including BPC-157 and TB-500, are banned by international sports authorities as doping substances.
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The other side:
Kennedy points to those potentially dangerous compounds as a reason for easing FDA restrictions. He and other peptide proponents say strict FDA rules have given rise to an illicit market of imported chemicals from China and other countries, which are not subject to U.S. drug standards.
"With the gray market you have no idea if you’re getting a good product," Kennedy said on Joe Rogan’s podcast last year. "And a lot of this stuff that we’ve looked at is just very, very substandard."
Do peptides work?
Kennedy and Rogan have both said peptides helped them heal from injuries, while celebrities like Jennifer Aniston have boasted about their anti-aging effects. But there’s little scientific research to back those claims.
The purported benefits of peptides are based mostly on animal studies that were "promising in the lab," but "untested in people," Ring said. There’s been one human study so far with "significant methodological problems and no control group," she added.
A comprehensive review published in 2026 concluded that "significant research regarding the safety and efficacy of these therapeutic methods is required before definitive recommendations can be made," Ring said.
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"Researchers also note that the placebo effect, amplified by social media, may be driving much of the perceived benefit people report," she said.
Still, Ring hasn’t written off peptides as potentially beneficial. She points to GLP-1 weight loss peptides, which "went from niche diabetes medications to transforming how we think about obesity and metabolic disease."
"Peptide therapies could follow a similar trajectory, but only if they go through the rigorous human trials that the GLP-1s did," she said. "The biology is genuinely interesting. The current market, however, is getting way ahead of the science."
What are the risks of taking peptides?
Why you should care:
Peptide proponents often suggest their products are safe because they are based on substances found in the body, but Ring said there are two risk factors to consider with unregulated peptides: quality control of the products being sold and what these chemicals are doing to your body.
Studies of some "falsified" peptide products showed arsenic at levels up to ten times the toxicity limit for injectable drugs, Ring said, along with lead contamination.
"Purity in some products ranges from just 5–75%, and mislabeling - wrong ingredients, incorrect doses, or none of the stated compound at all - is documented," she said.
"On the health side, documented concerns include cardiovascular strain, insulin resistance, psychiatric instability, and blood clots," Ring said. "And because none of these compounds have gone through rigorous human trials, the long-term effects of chronic use are simply unknown."
RFK vows to end FDA ‘war on peptides’
For years, the Food and Drug Administration has been trying to crack down on the peptides space, sending warning letters to clinics that promote the products and adding more than two dozen peptides to a list of ingredients that should not be made by specialty pharmacies that often custom mix the formulations.
Kennedy, who has vowed to end the "war at the FDA" on peptides and other alternative treatments as part of his "Make America Healthy Again" movement, says that’s going to change.
What's next:
The Food and Drug Administration will hold a meeting this summer to consider easing the current restrictions on more than a half dozen peptide injections.
The Source: This report includes comments from Dr. Melinda Ring, director of the Osher Center for Integrative Health at Northwestern University Feinberg School of Medicine, and information from The Associated Press.