If you’ve been researching longevity medicine or functional health optimization, you’ve likely come across the term peptide therapy. It’s a field that has grown considerably over the past decade, attracting serious interest from researchers, physicians, and patients who want to support healing, energy, and healthy aging through targeted, biologically precise interventions. At Ageless Future in Seattle, our physician-led approach treats peptide therapy not as a trend but as a carefully supervised clinical tool — one that requires a thorough understanding of the underlying science and an honest assessment of what the evidence currently supports.
This article introduces the foundational concepts of peptide therapy and provides an honest, science-grounded overview of three compounds our clinical team follows closely: BPC-157, NAD+, and Sermorelin.
What Are Peptides, and Why Do They Matter?
Peptides are short chains of amino acids — the same building blocks that make up proteins. Unlike full proteins, peptides are small enough to interact directly with specific cell receptors, acting as highly targeted biological signals. The human body naturally produces hundreds of peptides that regulate everything from inflammation and tissue repair to hormone release and metabolic function.
Therapeutic peptides are either identical to naturally occurring compounds or are synthetic analogues designed to mimic or amplify specific biological signals. Because they often work within pathways the body already uses, many peptides have favorable tolerability profiles — though, as with any therapeutic agent, appropriate medical supervision is essential.
BPC-157: A Peptide With a Promising Research Profile — and Evolving Regulations
BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide originally derived from a protein found in human gastric juice. Over the past three decades, it has been the subject of more than 100 peer-reviewed animal studies examining its effects on tissue repair, gut health, musculoskeletal healing, and neurological function.
Mechanistically, BPC-157 appears to work through the VEGFR2-Akt-eNOS signaling axis, promoting angiogenesis (new blood vessel formation), fibroblast activity, and anti-inflammatory effects in injured tissue. Research in animal models has shown accelerated healing of tendons, ligaments, muscle, and gastrointestinal tissue. What makes BPC-157 particularly unusual among studied peptides is its stability — it retains its structure in human gastric juice for more than 24 hours, a property that enables activity following oral administration.
It is important to be transparent about the regulatory picture. BPC-157 is not FDA-approved for any human use. Large-scale controlled human clinical trials have not yet been completed. The existing evidence base is primarily preclinical. The regulatory situation has also been evolving rapidly: in 2023, the FDA placed BPC-157 on its Category 2 restricted list, which blocked licensed compounding pharmacies from preparing it. On April 15, 2026, the FDA removed it from that restricted list. Now, the Pharmacy Compounding Advisory Committee is meeting July 23–24, 2026 to evaluate whether to formally add BPC-157 to the 503A Bulks List — which, if approved, would allow licensed compounding pharmacies to prepare it under physician prescription.
The regulatory status of BPC-157 is current as of this article’s publication. Regulations in this area continue to evolve; your Ageless Future physician will confirm what is currently available and appropriate for your situation.
NAD+: Cellular Energy, DNA Repair, and What the Evidence Actually Shows
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme found in every living cell. It plays a central role in mitochondrial energy production and is involved in DNA repair mechanisms that help maintain cellular health. Critically, NAD+ levels decline with age, a decline that researchers believe may contribute to age-related changes in energy, cognition, and metabolic function.
The most studied approach to raising NAD+ levels involves oral precursor compounds — nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN). A peer-reviewed review published in a major scientific journal found that NR and NMN are safe, well tolerated, and can measurably increase NAD+ levels in the bloodstream and multiple tissues. Some studies in that review also found select improvements in cardiovascular, metabolic, and physical function, particularly in individuals with chronic conditions or reduced baseline function.
IV NAD+ infusions, which bypass the digestive system to deliver the compound directly into the bloodstream, have been shown in smaller studies to be generally well tolerated, though they can involve side effects including temporary nausea and abdominal discomfort during infusion.
What the evidence does not yet support is the sweeping anti-aging narrative that surrounds NAD+ in some wellness marketing. As NPR reported in May 2026, the health advantages of increasing NAD+ “have yet to be confirmed in large-scale human research.” Much of the enthusiasm for NAD+ as a longevity compound comes from animal studies, and as researchers note, findings in mice do not always translate to humans. The PMC review is direct in its conclusion: the clinical evidence that raising NAD+ concentrations improves physiological function in humans “is unclear,” and the data from existing small trials “need confirmation” from larger studies.
At Ageless Future, we consider NAD+ support a promising and reasonable intervention for some patients — particularly for energy metabolism and cognitive support — while being clear that it is not a guaranteed anti-aging treatment. The science is encouraging; large-scale confirmatory human trials are still underway.
Sermorelin: Supporting the Body’s Own Growth Hormone Production
Sermorelin is a synthetic analogue of growth hormone-releasing hormone (GHRH), consisting of the first 29 amino acids of the naturally occurring molecule. Rather than delivering growth hormone directly, sermorelin works by signaling the pituitary gland to produce and release its own growth hormone — preserving the body’s natural feedback and regulatory mechanisms.
Sermorelin was originally studied and used in a pediatric diagnostic context. Today, it is sometimes used off-label by physicians in a wellness and healthy-aging context to support body composition, recovery, and vitality in adults. It is important to be accurate: sermorelin is not FDA-approved as an anti-aging treatment. Its use in adult wellness programs represents an off-label application made under physician clinical judgment — not a formally evaluated, FDA-sanctioned indication. Any responsible provider will make this distinction clear. As a peer-reviewed review in the medical literature notes, sermorelin stimulates patients’ own pituitary glands by binding specific receptors, which distinguishes it from exogenous growth hormone replacement and may offer a different safety profile.
Peptide Therapy and the Longevity Medicine Approach
Peptide therapy in Seattle and across the functional medicine space is not a one-size-fits-all protocol. Responsible clinical programs — including ours at Ageless Future — start with a comprehensive evaluation: health history, baseline labs, hormone panels, and a detailed conversation about your goals. Peptides are tools within a broader personalized health strategy, not stand-alone solutions.
The compounds discussed here represent some of the most actively researched areas in this field. The science is genuinely interesting and, in many cases, encouraging. Our role as a physician-led practice is to help you navigate that evidence honestly — including being transparent about what makes a peptide program safe — connecting you with interventions that make sense for your individual biology, while being transparent about what is proven, what is promising, and what remains to be confirmed by future research.
This content is for informational purposes only and does not replace personalized medical advice. Talk to your Ageless Future physician before starting any protocol.
Curious how peptide therapy might fit alongside lab testing and biological age tracking? See our guide to reading your longevity blood panel.
Ready to explore whether peptide therapy is right for you? Call Ageless Future in Seattle at (206) 624-0397 or fill out our contact form to schedule a consultation. Our physicians will review your health history, walk you through the current evidence, and help you build a protocol tailored to your goals.