Because injectable peptides are not FDA-approved, they exist in a legal gray area and are sold as research chemicals, says Dr. Schwarcz. (Again, there is not even a standard for the glow peptide stack injection, although the ingredients listed above are typical.)
Their regulatory status can vary depending on how they are sourced and administered, Reszko says.
Because peptide stack injections are not FDA-approved, “safety and efficacy data are missing,” Goldenberg says. One scientific analysis linked BPC-157 with injection site pain, a decreased sensitivity to insulin (a hormone that helps escort glucose to cells, where it’s used for energy), and water retention.
“There is a high risk of infection, contamination, incorrect dosing, and serious reactions,” Goldenberg says. He also noted “a lack of medical oversight” as concerning.
“There is also no standardized protocol for many of these compounds, which increases the potential for adverse effects,” Reszko says. Stacking these peptides together is “dangerous” as well, Vyas says. “There aren’t well-established human doses for these peptides on their own, and even less is known about how they interact together,” he says.
Long-term human safety data also “does not exist” for any of these peptides when injected, Vyas says. “That doesn’t prove they’re dangerous, but it means no one can honestly tell someone they’re safe, either,” he says. “The concern is that by injecting them, people are exposing their entire body systemically to compounds that have never been rigorously tested in humans.” It’s also unclear if people with certain underlying health conditions will run a higher risk of harmful side effects from the peptide stack. There is also no standardized protocol for injecting these peptides, Reszko says.
U.S. Secretary of Health and Human Services Robert F. Kennedy Jr. shared on the Joe Rogan Experience podcast that he plans to remove the FDA’s ban on several peptides, but also acknowledged in that interview that there isn’t robust scientific data to support their use. “Even with growing interest in peptides, these treatments should always be approached within a controlled medical setting,” Rezko says.
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