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Are peptides the fountain of youth? Doctors warn hype may outpace science

  • February 08, 2026
  • Health Care

Doctor reveals how protein supports longevity and healthy aging Video

The most reliable way to receive peptide therapy is through injection, according to Vinjamoori, as some oral forms can be “under-absorbed” or may rely on added ingredients that can cause side effects.

“‘Safe’ is less about the route and more about the molecule, dose, purity and monitoring,” he told Fox News Digital.

“Most peptides have an extremely strong track safety record based on the data we do have — but there is still much that we do not know.”

Approval and regulation

Some peptides are FDA-approved for specific conditions, including GLP-1s and growth-hormone stimulators. These may be prescribed off-label in some contexts, although risks and benefits vary and evidence may be limited, according to experts.

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There are also some peptides that are not FDA-approved. “Many ‘fitness’ peptides discussed online are in early clinical phases or used only in research settings,” Vinjamoori noted.

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“[Peptides] should be approached as a combination of lifestyle measures that contribute to better healthspan,” one expert said. (iStock)

Perez warned that peptides have little to no regulation in many countries, which means online vendors may sell fake, poor-quality or dangerous products. 

“Selling unproven, miracle-promising or supplement-peddling products with little accountability or third-party testing is a dangerous red flag,” he said.

Starting safely

For those considering peptides, Vinjamoori recommends watching out for the following red flags.

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  • Sourcing issues: Non-pharmacy “research chemicals,” lack of third-party testing or unclear labeling
  • Overblown claims: Promises of rapid muscle gain or fat loss with no training changes
  • Too many compounds: Stacking multiple substances without clear targets or bloodwork
  • Lack of oversight: No clinician, baseline labs, or plan for cycling or stopping

“The most effective longevity care is proactive, personalized, and grounded in biomarkers and scientific evidence,” Younggren added. “It should be approached as a combination of lifestyle measures that contribute to better healthspan.”

Doctor talking to a patient in a consultation at the office

Anyone interested in peptides should consult a physician to ensure that they receive a safe product and that it is used appropriately. (iStock)

Perez emphasized the importance of starting conservatively. “Understand the science, know the source and get medical guidance,” he advised. “Peptide therapy isn’t one-size-fits-all; it’s nuanced and still evolving.”

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While peptides may address issues that fall outside the reach of conventional medicine, Perez said, the supporting clinical data is still being developed.

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“Excessive use can lead to a decrease in their therapeutic effects and may cause adverse reactions, so more is not necessarily better,” he cautioned.

Anyone interested in peptides should consult with a physician to ensure that they receive a safe product and that it is used appropriately.

Article source: https://www.foxnews.com/health/peptides-fountain-youth-doctors-warn-hype-may-outpace-science

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