Longevia Research:
The Standard in US Peptides.
U.S.-manufactured compounds produced in cGMP- and ISO-certified laboratories. Independently verified for 99%+ purity.
Engineered for precision research. Trusted for consistency.
Discover Best-Selling Research Peptides
Every compound in our best-seller lineup is independently verified by third-party HPLC and LC-MS analysis. Browse our most-requested research peptides — each shipped from US-based facilities with a lot-specific Certificate of Analysis.
Tirzepatide
Tirzepatide is a synthetic 39-amino-acid dual incretin receptor agonist peptide that activates both the glucose-dependent insulinotropic polypeptide receptor (GIPR) and the glucagon-like peptide-1 receptor (GLP-1R).Research has examined tirzepatide across incretin receptor pharmacology, GIPR and GLP-1R signaling, glucose-dependent insulin secretion models, and metabolic biology. Longevia Research supplies tirzepatide in 10mg, 20mg, 30mg, and 60mg research-grade vials for qualified laboratory use. Tirzepatide is the active pharmaceutical ingredient in Mounjaro (approved by the FDA in 2022 for type 2 diabetes mellitus) and Zepbound (approved by the FDA in 2023 for chronic weight management) — both marketed by Eli Lilly and Company. These approvals concern regulated pharmaceutical-grade formulations under defined clinical conditions and are entirely distinct from the Longevia Research research vial. This product is supplied for Research Use Only and is not intended for human or veterinary use.
Tesa/IPA
Tesa/IPA is a dual-compound research product supplied by Longevia Research, combining two synthetic research peptides — Tesamorelin and Ipamorelin — that engage distinct receptor systems within the growth-hormone axis. The product is available in two vial configurations: a 6mg Tesamorelin / 3mg Ipamorelin vial, and a 13mg Tesamorelin / 3mg Ipamorelin vial. Both formats are supplied as laboratory research materials intended for qualified researchers studying growth-hormone-axis pharmacology and related experimental systems.Tesamorelin is also an FDA-approved pharmaceutical compound, marketed under the trade name Egrifta, for the specific indication of excess abdominal fat accumulation in HIV-infected adults with lipodystrophy — an approval that applies only to the licensed pharmaceutical product, not to research material. Ipamorelin (H-Aib-His-D-2-Nal-D-Phe-Lys-NH₂) is a synthetic pentapeptide studied as a selective agonist of the growth-hormone secretagogue receptor (GHSR-1a). The two compounds address different but complementary research nodes within the GH secretory system, making the combination a recognised experimental tool for investigators examining GH-axis signalling through dual-receptor engagement.
BPC-157
BPC-157 is a synthetic 15-amino-acid pentadecapeptide derived from a partial sequence of body protection compound (BPC) — a protein isolated from human gastric juice. It has been investigated across a wide range of preclinical research areas including tendon and ligament biology, gastrointestinal tissue models, nitric oxide (NO) signalling, growth factor receptor pathways, and angiogenesis research in cell-based and animal experimental systems. Longevia Research supplies BPC-157 in 5mg and 10mg research-grade vials for qualified laboratory use.
Reconstitution Solution
Reconstitution Solution is a sterile, non-pyrogenic preparation of water for injection containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is the standard reconstitution solvent used in peptide research laboratories for dissolving lyophilized peptide compounds prior to experimental application. The benzyl alcohol preservative inhibits microbial growth, allowing multiple withdrawals from a single vial over a defined period under aseptic conditions. This product is manufactured under strict quality controls and is intended exclusively for laboratory research use.
NAD⁺
NAD⁺ (nicotinamide adenine dinucleotide, oxidised form) is a naturally occurring dinucleotide coenzyme found in all living cells, where it functions as a central mediator of cellular energy metabolism, redox chemistry, and enzymatic signaling. It serves as a hydride-transfer coenzyme in over 400 enzymatic reactions — most critically in the citric acid cycle and oxidative phosphorylation — and as a substrate consumed by NAD⁺-dependent signaling enzymes including sirtuins (SIRTs), poly(ADP-ribose) polymerases (PARPs), and cyclic ADP-ribose synthases (CD38/CD157). Research has examined NAD⁺ across cellular energy metabolism, sirtuin biology, PARP enzyme systems, mitochondrial function, and NAD⁺ homeostasis models. Longevia Research supplies NAD⁺ in 500mg and 1000mg research-grade vials for qualified laboratory use. NAD⁺ is one of the most extensively characterised coenzymes in biochemistry — essential to cellular life and studied across multiple research disciplines including metabolism, aging biology, DNA repair research, and circadian biology. Its cellular concentration declines with aging in multiple tissues in animal and human observational studies, generating substantial research interest in NAD⁺ homeostasis and the biology of NAD⁺-dependent enzymes. This product is supplied for Research Use Only and is not intended for human or veterinary use.
MOTS-C
MOTS-C is a 16-amino-acid mitochondrial-derived peptide (MDP) encoded within the mitochondrial genome, positioning it at the center of modern bioenergetics and metabolic regulation research. Our research-grade MOTS-C is synthesized to exacting laboratory standards, with each batch verified for purity and structural integrity before release. Investigators studying cellular energy production, AMPK pathway activation, and exercise-linked metabolic adaptation rely on consistent, high-purity material. Every vial is lyophilized and sealed under conditions designed to preserve molecular stability. This compound is intended strictly for in-vitro and laboratory research applications by qualified professionals.
Epithalon
Epithalon (also designated Epitalon) is a synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly, derived from epithalamin — a polypeptide extract of the bovine pineal gland investigated in aging biology research. It has been examined in research involving telomerase activation, telomere length biology, pineal gland peptide pharmacology, and geroscience models in cell-based and animal experimental systems. Longevia Research supplies Epithalon in 10mg and 50mg research-grade vials for qualified laboratory use. Epithalon is one of the most studied synthetic tetrapeptides in geroscience and aging biology research, with a published literature originating from the work of Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology. Research has examined it primarily in cell-based telomerase activity studies and in animal longevity models. It has no regulatory approval for any therapeutic indication in any major western jurisdiction and no completed human clinical trial data in peer-reviewed literature. This product is supplied for Research Use Only and is not intended for human or veterinary use.
KLOW Blend
KLOW Blend is a premium, multi-peptide research blend formulated for laboratories studying tissue regeneration, collagen remodeling, and cellular recovery pathways. Each component peptide is synthesized to research-grade standards and combined to support investigation into synergistic signaling effects rarely captured by single-molecule compounds. Researchers studying recovery-linked cellular mechanisms rely on consistent, high-purity blends to generate reproducible data across repeated trials. Every batch is meticulously synthesized using solid-phase techniques and screened via HPLC to isolate the target peptides from truncated or deletion sequences, then lyophilized to preserve structural integrity during storage and shipping. This blend is intended strictly for laboratory and in-vitro research use by qualified professionals.
7X Tested.
On Every Single Batch.
Third-party purity verification is the cornerstone of research-grade compounds. Every vial we ship carries an independently verified COA that proves what is inside — not what we claim is inside. Here is exactly what we test for, and why it matters.
≥99% HPLC PURITY ANALYSIS
Stringent chromatographic isolation for every compound – verified before any order ships.
MASS SPECTROMETRY (LC-MS Identity)
Confirms exact molecular match through mass spectrometry analysis.
ENDOTOXIN-FREE
Limulus Amebocyte Lysate (LAL) testing confirms endotoxin levels are well below research-safe thresholds.
STERILITY VERIFICATION
Microbial sterility tests performed in ISO/IEC 17025 Lab.
CONTENT QUANTIFICATION
Confirms labeled potency and concentration.
APPEARANCE & PHYSICAL CHECK
Inspects visual quality and physical integrity.
ILS LAB
Third Party Verified – Independently reviewed and verified by ILS Labs.
≥99% HPLC PURITY ANALYSIS
Stringent chromatographic isolation for every compound – verified before any order ships.
MASS SPECTROMETRY (LC-MS Identity)
Confirms exact molecular match through mass spectrometry analysis.
ENDOTOXIN-FREE
Limulus Amebocyte Lysate (LAL) testing confirms endotoxin levels are well below research-safe thresholds.
STERILITY VERIFICATION
Microbial sterility tests performed in ISO/IEC 17025 Lab.
CONTENT QUANTIFICATION
Confirms labeled potency and concentration.
APPEARANCE & PHYSICAL CHECK
Inspects visual quality and physical integrity.
ILS LAB
Third Party Verified – Independently reviewed and verified by ILS Labs.
Eight Research Focuses: Shop by Category
From bioregulators and growth factors to metabolic and recovery compounds, each category is stocked with research peptides meeting our strict 99%+ purity standard. Every product ships with an independently verified COA.
Our Commitment to Researchers
Immediate Availability
Top research peptides are ready to ship. No backorders. No waiting. Fast shipping guaranteed.
Safe & Protected Shipping
Cold-pack shipping keeps peptides stable. Full tracking provided on every USA order.
99%+ Purity Guaranteed
Every batch is tested by U.S. ISO Labs, with a full Certificate of Analysis Included.
Researcher Community
Connect with researchers, share peer insights, and discuss peptide research applications.
≥99% HPLC Purity — Every Batch, No Exceptions
High-Performance Liquid Chromatography (HPLC) testing is performed on every production batch. Any sample failing to meet our strict 99% purity threshold is immediately discarded — never sold.
LC-MS Verified Peptide Identity
Mass spectrometry (LC-MS) confirms the exact molecular weight and identity of every compound we ship. You receive the peptide on the label, exactly as described.
COA with Every Order — Full Transparency
Every order ships with a lot-specific Certificate of Analysis (COA) traceable to its independent test results. Our full COA library is publicly accessible at any time.
The longevia Standard: Why Purity Matters
Purity is not a marketing claim — it is a measurable, verifiable fact. Impure compounds produce unreliable research results. We operate at the intersection of aesthetic science and analytical chemistry so that every batch you receive is exactly what it claims to be.
US-Based Synthesis — Zero Overseas Powders
99%+ Purity Floor — Any Batch Below This Gets Discarded
Cold-Chain Logistics — Molecular Integrity, Guaranteed
Every compound is synthesized in US-based, ISO-certified peptide laboratories using closed-loop solid-phase peptide synthesis (SPPS). We do not purchase raw, untested powders from overseas suppliers or third-party bulk brokers. Our closed-loop supply chain ensures complete molecular traceability from synthesis to shipping.
The longevia Standard: Why Purity Matters
Purity is not a marketing claim — it is a measurable, verifiable fact. Impure compounds produce unreliable research results. We operate at the intersection of aesthetic science and analytical chemistry so that every batch you receive is exactly what it claims to be.
US-Based Synthesis — Zero Overseas Powders
Every compound is synthesized in US-based, ISO-certified peptide laboratories using closed-loop solid-phase peptide synthesis (SPPS). We do not purchase raw, untested powders from overseas suppliers or third-party bulk brokers. Our closed-loop supply chain ensures complete molecular traceability from synthesis to shipping.
99%+ Purity Floor — Any Batch Below This Gets Discarded
We enforce a non-negotiable 99% purity minimum across our entire catalog. Every single batch is independently tested by third-party laboratories using both HPLC chromatography and LC-MS mass spectrometry. If a batch fails to meet this threshold — for any reason — it is discarded immediately and never fulfilled.
Cold-Chain Logistics — Molecular Integrity, Guaranteed
Peptides are structurally fragile molecules. Thermal degradation begins at room temperature and accelerates over time. We store all inventory in climate-controlled, medical-grade refrigeration and ship using validated cold-chain packaging specifically designed to maintain peptide integrity from our facility to your bench — regardless of transit conditions.
Clinical Reviews & Research Guidelines
Our journal publishes peer-reviewed literature summaries, compound mechanism deep dives, and methodology guides covering purity testing, reconstitution, and storage. Written for researchers who need the science, not the hype.
Semaglutide vs. Tirzepatide vs. GLP-3 (Rt): A Head-to-Head Research Comparison
NAD+ Peptide Research: Mitochondrial Function, Cellular Repair, and the Sirtuin Pathway
GLP-3 (Rt) Peptide: Complete Research Guide to the GLP-1/GIP/Glucagon Triple Agonist
MOTS-C Peptide: Mitochondrial Signaling, Exercise Mimetic Research, and the AMPK Activation Pathway
GLP-3 Peptide: Triple Receptor Agonism, Mechanism of Action, and What Researchers Need to Know in 2026
Frequently Asked Questions About Research Peptides
Everything you need to know about our purity standards, testing methodology, ordering process, and shipping. For institutional or bulk inquiries, contact our support team directly.
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