I’m a longevity doctor — 3 peptides to help live longer

Longevity specialist Dr. Michael Aziz highlighted three peptides—semaglutide, epitalon and GHK‑Cu—that are being explored for their potential to support metabolic health, cellular aging and overall longevity, while also warning about the growing “gray market” for unregulated products.

Semaglutide

Semaglutide, sold under the brand names Ozempic and Wegovy, is best known for weight‑loss and diabetes management. Dr. Aziz says research shows it can improve metabolic function and lower the risk of stroke and heart attack by roughly 20 % when used with proper diet, protein intake and exercise. He notes a trend toward “maintenance doses” aimed at preserving metabolic health rather than dramatic weight loss.

Some clinicians, however, advise patients to prioritize lifestyle changes before adopting GLP‑1 therapies because of side‑effects that can include nausea, dizziness, eating disorders, pancreatitis and thyroid cancer.

Epitalon

Epitalon is a peptide that targets telomere shortening, a hallmark of cellular aging. Dr. Aziz explains that by activating a specific enzyme, epitalon may lengthen telomeres and thereby delay cell death. Laboratory studies on rat cells and human fetal tissue have shown increased cell proliferation and longer telomeres after treatment.

Although human trials are still limited, the doctor reports that epitalon appears to improve sleep, skin health and antioxidant capacity and may help protect against age‑related diseases such as cancer, heart disease and dementia.

GHK‑Cu

GHK‑Cu, a copper‑binding peptide found in saliva, urine and plasma, is thought to stimulate collagen production and DNA repair. According to Dr. Aziz, it may help maintain stem‑cell populations that decline with age, potentially extending the functional lifespan of cells.

Current applications are largely cosmetic, with the peptide marketed in topical serums. Injections are reported to be painful, and the doctor recommends topical use when possible.

Access and Safety Considerations

Prescriptions for semaglutide are increasingly available through telehealth platforms such as Hers, Hims and Ro, but Dr. Aziz stresses the importance of obtaining a prescription from a qualified medical professional. Many other peptides lack FDA approval and are sold on “gray‑market” websites, primarily from Southeast Asia. Buyers often turn to TikTok and Reddit for DIY administration guidance.

Unregulated products may be mislabeled as “research‑only,” potentially containing counterfeit or ineffective material, which poses injection safety risks.

Did You Know? The FDA currently classifies more than 30 amino acids as peptides, though many additional peptide compounds remain unrecognized.

Expert Insight: While early data suggest these peptides could modestly enhance metabolic and cellular health, their unregulated distribution creates a trade‑off between accessibility and safety. Clinicians are likely to weigh the promise of anti‑aging effects against the need for rigorous dosing protocols and monitoring.

Frequently Asked Questions

What is a peptide?

According to Dr. Aziz, a peptide is “basically a short chain of amino acids that are connected together.”

What benefits does semaglutide offer for longevity?

Research cited by Dr. Aziz indicates semaglutide can improve metabolic function and reduce the risk of stroke and heart attack by about 20 % when combined with proper nutrition and exercise.

Why is the gray market for peptides a concern?

The gray market sells peptides that are not FDA‑approved, often labelled for animal research or laboratory use. Dr. Aziz warns that such products may be counterfeit or unsafe for injection, leading to potential health risks.

What are your thoughts on incorporating peptides into a longevity plan?