Andrea Steinbrenner receives an IV infusion at Pure Alchemy Wellness, Tuesday, Nov. 11, 2025, in Chula Vista, Calif. (AP Photo)
Peptide injections are rapidly gaining traction among influencers, fitness personalities, and celebrities who promote them as shortcuts to better skin, leaner bodies, and faster recovery. Yet many of these compounds lack regulatory approval, raising serious questions about safety and long-term health risks.
What Peptides Actually Do
Peptides are short chains of amino acids that carry out key biological functions. Insulin and GLP-1 — both FDA-approved — are well-known examples that regulate blood sugar. But dozens of peptides now circulating online have never been approved for use in humans. Some have shown promise only in animal studies, not clinical trials.
Why the Trend Is Exploding
Synthetic peptides have existed for decades, often used off-label for ulcers and neurological conditions. Their recent surge stems from wellness influencers and online personalities who champion peptides for claims such as improved skin, accelerated healing, and anti-aging effects.
These compounds include popular names like BPC-157, thymosin alpha, and GHK-Copper. Some are banned in professional sports due to their performance-enhancing effects.
Experts say the trend is especially risky because many users combine multiple peptides at once.
“Influencers often promote stacking two, three or four peptides each month,” said Dr. Eric Topol of Scripps Research Translational Institute. “That’s where it becomes dangerous.”
Celebrity Influence Fuels Demand
Celebrities have amplified the hype.
Joe Rogan has spoken openly about using BPC-157 for injury recovery. Jennifer Aniston has mentioned weekly peptide injections and represents a brand selling peptide-based supplements.
“With any celebrity endorsement, public curiosity shoots up,” said Kay Robins, a clinical nurse who previously offered several peptides at her San Diego clinic. She has since stopped offering those peptides after FDA scrutiny.
The FDA’s Stance and Regulatory Concerns
Most unapproved peptides sold online or in clinics are technically illegal.
Anything injected to improve health is classified as a drug, requiring FDA approval. Many peptides are treated as biologics — high-risk substances that need strict manufacturing controls.
The FDA has added more than two dozen peptides to a list of compounds that should not be made by pharmacies because of safety issues.
Some companies try to sell peptides as dietary supplements, especially in pill or gummy form. But the FDA only allows supplements containing approved ingredients, and most peptides do not qualify. Experts also note that oral peptides usually dissolve in the gut, offering little effect.
Who Manufactures These Products?
Compounding pharmacies produce most injectable peptides in the U.S. These pharmacies mix custom medications and face far less oversight than major drug manufacturers.
When demand surged for GLP-1 drugs, many compounders made their own versions due to temporary shortages. The FDA has since declared the shortage over, but some pharmacies continue producing unauthorized formulations, sometimes adding ingredients like vitamin B.
“The financial incentives are unlike anything compounding has seen before,” said regulatory attorney Nathaniel Lacktman.
Some of this new production capacity has shifted to unapproved peptides like BPC-157, drawing increased FDA attention.
A Political Connection: The MAHA Movement
Peptides have also entered political conversation.
Health Secretary Robert F. Kennedy Jr. has repeatedly defended peptide therapies and accused the FDA of unfair restrictions. Many of his Make America Healthy Again supporters view peptides as central to their wellness philosophy.
Some figures close to Kennedy — including biohacker Gary Brecka and functional medicine author Dr. Mark Hyman — are among the most visible promoters of peptide use.
Industry watchers anticipate that Kennedy may push for relaxed rules, potentially allowing certain peptides to return to the market.
The booming interest, however, continues to outpace scientific research. And as more people turn to unapproved peptides, experts warn that the risks could prove far greater than the promised rewards.
