Interest in peptides is skyrocketing as patients and fitness enthusiasts look beyond GLP-1 drugs for ways to improve weight management, build muscle, and recover from injuries.

New York fitness trainer Kenny Santucci warned that consumers experimenting with peptides should only do so under medical supervision, noting the risks of unverified products.

These lab-made compounds, which mimic natural molecules to influence biological functions, have drawn attention for their therapeutic potential and accessibility outside traditional pharmaceutical channels.

The market has grown rapidly despite minimal oversight, leading some experts to call it a “Wild West.”

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Both compounding pharmacies and unregulated online vendors continue to sell peptide formulations directly to consumers.

The U.S. Food and Drug Administration plans to review whether to relax certain restrictions on peptides at a meeting scheduled for the summer of 2026, a move that could redefine how these drugs are used and prescribed.

Dr. Alex Tatem, a board-certified urologist in Indiana who specializes in men’s health and peptides, traced the surge in popularity back to GLP-1 drugs such as semaglutide and tirzepatide.

“These were all medications that were designed to help people live well and live as healthy as possible,” Tatem said.

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He noted that GLP-1s proved “incredibly effective” for improving body composition, metabolic health, and cardiovascular and neurologic performance. That success inspired broader public fascination with other peptides.

Tatem explained that some patients struggle with the single weekly GLP-1 injections and may benefit from smaller, more frequent doses.

Compounding pharmacies stepped in to offer custom versions of these medications during recent national shortages.

“The reason compounders had to do this was because there was so much demand for GLP-1s that there was actually a national shortage,” he said.

Current law allows such compounding during shortages, which has encouraged major investment in peptide production.

Even after supply stabilized, compounders continued producing customized formulas, sparking what Tatem described as a “huge clash” with pharmaceutical companies that view the activity as a violation of their intellectual property rights.

He said overly strict regulation of compounding pharmacies could jeopardize access to personalized treatments.

“That is a real concern for clinicians like me who really care more about patient access,” Tatem said.

He also observed that several peptides have been administered for years without evidence of toxicity or cancer.

However, the FDA tightened control over nineteen peptides in September 2023, making them illegal to manufacture.

“They seemed to be working and seemed to be efficacious for patients, and all of a sudden they were banned, which inadvertently ended up contributing to this surge in interest,” Tatem said. He compared the reaction to “what we saw with prohibition.”

Most peptides gaining online popularity are not approved prescription drugs in the United States, though they are often promoted for improving skin health, recovery, sleep, and hormone balance.

Tatem pointed out that many of these compounds were designed to enhance wellness rather than to treat specific disease states, noting that this distinction limits their path to full FDA approval.

He added that modern patients are increasingly seeking therapies that elevate their quality of life, such as testosterone and peptide approaches, alongside core habits like quality sleep, protein-rich diets, and resistance training.

“If you end up pulling a tendon or pulling a hamstring, and you’re just now starting to get some momentum in the gym, that’s really where peptides start to step in,” Tatem said.

Experts caution that consumers should avoid gray-market products, rely only on licensed physicians and trusted pharmacies, and approach peptides as potential complements to healthy living rather than quick fixes.