‘Wild West’ of Untested Peptides Has Americans Paying in Crypto to Get Their Fix

Approved medicines move through clinical trials, regulators and pharmacies like Walgreens and CVS. Much of the online peptide trade bypasses that system

Bloomberg — The peptide boom has all the markings of a mainstream wellness craze: podcast evangelists, celebrity converts and a billion-dollar market promising shortcuts to weight loss, muscle gain and a longer life. One major hurdle: actually buying them.

Approved medicines move through clinical trials, regulators and pharmacies like Walgreens and CVS. Much of the online peptide trade bypasses that system. Cheaper compounds are shipped directly from overseas laboratories, without prescriptions or insurance coverage, some with disclaimers that they aren’t for human use.

Banks and credit card networks often won’t work with suppliers in that gray area because of the legal and regulatory risks surrounding products touted for unproven health benefits. A growing number of them take only Bitcoin.

That’s luring skeptics, including Zach, a 49-year-old marketing director from the Pacific Northwest. After months of searching for retatrutide, a weight-loss peptide Eli Lilly & Co. is developing, he found a vendor in China willing to sell him 20 vials of what it said was the experimental compound. The cost was $240 for roughly a year’s supply, compared with the $300 a month he would have paid a US reseller. 

There was one catch: payment had to be made in Bitcoin.

Zach, who asked not to disclose his last name for privacy reasons, had long dismissed Bitcoin as too speculative, an asset “with no underlying value.” The price difference gave him a reason to reconsider. “The cost difference is so drastic that it seemed kind of worth that risk.”

Gray market peptide vendors received $32 million in cryptocurrency during the first quarter of 2026, a 700% increase from a year earlier, according to new data from Chainalysis Inc, a blockchain analytics company. In recent months, the industry reached a pace that would generate more than $100 million a year.

For Zach, it was a quick education. The vendor linked to a website with instructions on how to buy and send cryptocurrency. Within days, he had opened a Coinbase Global Inc. account, bought Bitcoin for the first time and sent it to the seller’s wallet. The package arrived at his doorstep about a week later.

Zach’s conversion underscores one of the oldest and most durable use cases of digital assets: serving businesses that operate in legal gray zones. 

Demand is booming for peptides, short chains of amino acids that help regulate key biological processes throughout the body. While US regulators are revisiting the field and could ease restrictions on their use, the burgeoning market currently relies on digital assets as suppliers struggle to access traditional payment processors.

Cryptocurrency has long supported commerce that banks and card companies avoid. Silk Road made Bitcoin notorious as the currency of an online drug bazaar before US agents shut the marketplace in 2013. The peptide trade is extending that infrastructure to a different customer: wellness consumers with little previous connection to crypto or darknet markets.

“This is a market with buyers who are using crypto for the first time, and they may have not purchased drugs on the Silk Road or other dark net markets,” said Sara Graham, senior intelligence analyst at Chainalysis.

At TRM Labs, a security technology company that investigates digital asset fraud, researchers found that Chinese chemical producers were expanding into peptides. By combining on-chain analysis with open-source investigations of drug precursor manufacturers, it found cryptocurrency inflows for the sector hit $41.4 million in 2025 — a 20% year-over-year increase despite pressure from law enforcement.

“The market is huge and expanding,” said Ari Redbord, global head of policy at TRM Labs. “I am not sure there is a drug market in the world that’s growing as much and as fast as peptides.”

Peptides are marketed to help build muscle, recover faster, sleep better, sharpen focus or slow the effects of aging. While blockbuster injections such as Zepbound and Wegovy are peptide-based medicines that have been rigorously tested and formally approved, a universe of rivals is available without robust human safety or efficacy data.

Many are purchased online, where they’re marketed as “research chemicals.” They often carry prominent disclaimers stating they are neither approved by the FDA, nor intended for human or animal use. 

The market is currently like the “wild, wild west” said Lee Rosebush, chair of the American Academy of Peptide Medicine, a non-profit organization that advocates for regulation in the US. Taking a stricter approach would reduce the number of “research use only” manufacturers and provide patients better access to safe medicine, he said.

There is some movement in that direction. The Food and Drug Administration is convening an advisory committee to discuss whether some popular peptides should be made legally in the US.

Health and Human Services Secretary Robert F. Kennedy Jr. is a proponent, arguing that legalizing some peptides would help “shift demand away from the black market.”

Interest is growing fast. In a cramped corner of a Manhattan pub decorated with crypto memorabilia, more than 100 people packed shoulder to shoulder to hear a lecture on peptides. The room was hot, crowded and uncomfortable, but the audience remained fixed on Julius Ritter, the 20-something founder of the California Peptide Club who had traveled east to evangelize. 

Introducing himself, Ritter ticked through his credentials: founder of a longevity-focused meal delivery company, president of a residency and hackathon house in San Francisco and, as of this month, a sperm racer.

Over the next hour, Ritter, with his slideshow presentation, walked the audience through peptide chemistry, touted potential uses, acknowledged some of the risks and named several products. He ended with a live demonstration, pulling up his black T-shirt and injecting himself in front of the crowd to loud applause. During the question-and-answer session, Ritter patiently answered questions, admitting he uses peptides to boost his testosterone while largely downplaying concerns about their safety.

Peptides became a mainstay among gym enthusiasts and biohackers, helped by endorsements from influential podcasters such as Joe Rogan and Andrew Huberman. Even actress Jennifer Aniston told The Wall Street Journal in 2023 that she incorporated weekly peptide injections into her anti-aging routine.

But as peptides gained mainstream attention, regulators tightened oversight, pushing many vendors further underground. That did little to curb demand. Instead, buyers just found new ways to pay.

“One of the earliest use cases of crypto was in the dark market,” Redbord said. “The promise of crypto is cross-border value transfer. Bad actors can now send larger amounts of funds than ever before.”

Zach has reached his goal weight and says he is probably done buying peptides directly from China. He’d rather use a US supplier next time, even at a higher price. Whether that will provide more certainty about what he is injecting is far less clear.