Retatrutide RUO 40mg
Price range: $220.00 through $1,199.00
Retatrutide RUO 40mg from Profound Peptides is the largest single-vial format available for this compound. Each vial contains 49.66mg net peptide, independently verified at 99.689% purity by Freedom Diagnostics (COA: 2603130116, Lot: RET40-2162026). It is the format labs reach for when a study runs long, spans multiple treatment arms, or requires consistent peptide stock across a full research cycle without reordering mid-protocol. Freedom Diagnostics testing is publicly searchable at FreedomDiagnosticsTesting.com. For in vitro laboratory and scientific research use only. Not for human consumption.
About Product
Retatrutide RUO 40mg — Full Product Specifications
| Specification | Detail |
|---|---|
| Also Known As | |
| CAS Number | 2381089-83-2 |
| Molecular Formula | C221H342N46O68 |
| Molecular Weight | ~4,731 Da |
| Sequence Length | 39 amino acids |
| Vial Size | 40mg per vial |
| Form | White lyophilized powder |
| Purity — this batch | 99.689% — Freedom Diagnostics verified |
| Net Peptide Content | 49.66mg confirmed |
| Testing Method | HPLC + UV Detection + Mass Spectrometry (LCMS/MS) |
| Lot Number | RET40-2162026 |
| COA Accession | 2603130116 — publicly verifiable at FreedomDiagnosticsTesting.com |
| Half-life | ~144 hours (~6 days) in relevant research models |
| Long-term storage | -20°C, sealed vial, up to 24 months |
| Short-term storage | 2 to 8°C, up to 28 to 30 days reconstituted |
| Intended Use | In vitro laboratory research only — not for human use |
Certificate of Analysis — Freedom Diagnostics
Each vial ships with access to a batch-specific COA from Freedom Diagnostics, a US-owned independent testing laboratory. The current 40mg batch result is publicly searchable using the accession number below.
| COA Field | Detail |
|---|---|
| PURITY RESULT | 99.689% |
| TESTING LAB | Freedom Diagnostics (USA) |
| LOT NUMBER | RET40-2162026 |
| COA / ACCESSION | 2603130116 |
| TESTING METHOD | HPLC + Mass Spectrometry (LCMS/MS) |
| NET PEPTIDE CONTENT | 49.66mg confirmed |
| RECEIVED DATE | 03/13/2026 |
| REPORT DATE | 03/15/2026 |
| PRINCIPAL CHEMIST | Alex Johnson |
CTA:
Retatrutide RUO 40mg is the format suited to labs that plan their peptide supply before a study starts, not around it. A single 40mg vial reconstituted at 4mL gives a working concentration of 10mg/mL and approximately 4.96mL of usable solution. That is enough volume to support multiple independent treatment arms, run dosing titration curves, maintain a control group, and still have working stock remaining for satellite assays or protocol extensions — without touching a second vial.
Research groups that use this format tend to be running MASLD or hepatic fat studies requiring extended treatment windows, multi-receptor comparative studies where Retatrutide serves as the triple agonist reference compound, institutional preclinical programs tracking weight and metabolic markers across full study cycles, oncology models where consistent compound availability matters for tumor progression timelines, or research programs where batch-to-batch variability is a risk factor. One vial, one lot number, one COA. That consistency matters when you need your data to be reproducible.
Labs running extended protocols, multi-arm preclinical studies, or programs that cannot afford a supply gap mid-study. The 40mg format reduces reorder frequency, eliminates inter-batch variability risk, and lowers cost per milligram compared to smaller vials. If your study runs longer than 4 weeks or requires more than two treatment groups, the 40mg is worth the calculation.
99.689%, independently verified by Freedom Diagnostics via HPLC with UV Detection and Mass Spectrometry (LCMS/MS). COA accession 2603130116, net peptide content confirmed at 49.66mg. Searchable directly at FreedomDiagnosticsTesting.com using the accession number — no contact with Profound Peptides needed.
At 4mL of bacteriostatic water, you get a 10mg/mL working concentration and approximately 4.96mL of usable solution based on confirmed net peptide content of 49.66mg. For studies requiring lower concentrations, use more solvent volume — just adjust your volume calculations accordingly. Some researchers prefer 2mL for a 20mg/mL stock that they then dilute for specific assay concentrations.
For any protocol that spans more than a few weeks, divide the reconstituted solution into single-use volumes before storing. Label each aliquot with date, concentration, and study ID. Store at 2 to 8°C and use within 28 to 30 days. Do not refreeze reconstituted solution. For long-duration studies, consider keeping the remainder of the lyophilized powder at -20°C and reconstituting in smaller batches as needed.
No. The compound, testing methodology, and purity standard are identical across all three Retatrutide vial sizes (10mg, 20mg, 40mg). The 40mg format uses the same Freedom Diagnostics verification process. Each batch has its own independent COA. Lot RET40-2162026 tested at 99.689%.
Both. The 40mg format works for in vitro receptor binding assays, cellular signaling studies, and animal model protocols. The larger stock is particularly useful in animal studies where treatment duration runs 24 to 48 weeks — a common timeline in the published Retatrutide Phase 2 literature. For short in vitro assays, the 10mg or 20mg format is often sufficient.
The 40mg vial at $220 works out to $5.50 per mg. The 10mg vial at $85 is $8.50 per mg. For labs purchasing at scale, the 40mg format represents a roughly 35% cost reduction per milligram while maintaining identical purity standards and third-party verification.
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