Longevity · Research Phase
Klotho Peptide
No lawful US pathway
01 · Overview
Klotho is a protein that exists in membrane-bound and secreted forms, with the soluble ectodomain acting as a circulating factor. It serves as a coreceptor for fibroblast growth factor 23 in phosphate metabolism and has been linked to insulin signaling, oxidative stress and cellular senescence.
It is studied as a longevity factor, and therapeutic interest centers on recombinant forms or fragments. No klotho product is approved, and no human klotho trial was identified.
02 · Research summary & key findings
The rhesus form of klotho protein increased synaptic plasticity and cognition in mice, and a single administration of low-dose, but not high-dose, klotho enhanced memory in aged nonhuman primates (PMID 37400721). The authors describe systemic low-dose klotho as a possible future therapeutic in aging humans, which indicates that human testing had not been done at that point (PMID 37400721). No clinical trials of klotho peptides for lifespan, healthspan or cognition in humans were identified, so efficacy in people is unproven.
03 · Regulatory status
Klotho Peptide is in the research phase with limited clinical data in humans. Current evidence is primarily derived from preclinical (animal or in vitro) studies.
No lawful pathway today
Klotho Peptide is not FDA-approved and does not currently have a lawful prescription or compounding pathway in the United States, so we do not sell it and will not book a consultation for it. That can change: in 2026 FDA began reviewing several peptides for compounding. If you are working on the goal it is studied for, a licensed clinician can tell you what is lawfully available, which may be something else.
See the 3 FDA-approved compounds in Longevity
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Looking for a lawful, clinician-prescribed option for longevity and healthy ageing?
Klotho Peptide is a research compound, is not FDA-approved, and has no lawful US compounding pathway, so we do not offer it and no clinician we work with will prescribe it. Products sold online as “research chemicals” are not made or tested to the standards required of medicines. If you are working on longevity and healthy ageing, a licensed clinician can tell you at a free consultation whether an FDA-approved or lawfully compounded treatment fits you, or whether nothing does.
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04 · Administration routes
- Intravenous
References
- [1]Longevity factor klotho enhances cognition in aged nonhuman primates Nat Aging, 2023. PMID 37400721
Primary literature
- PubMed: "Klotho Peptide"
Peer-reviewed literature indexed by the National Library of Medicine.
- ClinicalTrials.gov: "Klotho Peptide"
Registered interventional and observational studies, including status and phase.
- PubChem: "Klotho Peptide"
Chemical structure, molecular properties, and bioactivity data.
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Disclaimer: This information is provided for educational and research purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any peptide therapy. The Peptide Association does not endorse or recommend any specific treatment protocol. See our editorial policy for how this content is produced and reviewed. Clinicians: join the network.