Find your flow

Peptides engineered like products, not powders.

★★★★★ 4.9/5 Trusted by 28,000+ researchers
Lab Tested CoA every batch Made in the USA

Proof, not promises.

Every batch is independently tested and backed by a publicly available Certificate of Analysis. Scan the QR code on your vial or explore our Lab Results page to verify every batch.

Certificate of Analysis
NUFLOW LABS · INDEPENDENT LAB REPORT
Verified
COMPOUNDRetatrutide 10mg
LOTNF082601
BATCHRET-010-002
METHODHPLC + MS
MFG / EXP08/2026 → 08/2028
HPLC PURITY99.4%
A. REYES · QC ANALYST SCAN QR ON VIAL ↗
Recently verified BATCH RET-010-002 · Retatrutide 10mg
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Nothing to hide.

Manufactured in the USA. Verified by independent labs. Published for anyone to check.
ISO 14644 cleanroomsealed under cGMP methodologycleanroom sealed
third-party testedindependent US lab — never our own
USP Type I glasspharma-grade borosilicate vialpharma-grade glass
nuflow vial
99%+ purityverified on every published batchverified every batch
batch traceableCoA one scan away
lyophilized in the USAvacuum-sealed for stabilitysealed in the USA
Reviews

What researchers say

★★★★★ 4.9/5 · 1,240 reviews
★★★★★

"The CoA matched the lot number on my vial exactly. First vendor I've used that publishes mass spec data, not just HPLC."

Jordan M.Verified buyer
★★★★★

"Ordered Monday, arrived Wednesday. Vials came sealed in the presentation case — packaging is on another level."

Sasha K.Verified buyer
★★★★★

"99.2% on my batch report. Reconstituted clean, no residue. Already reordered twice."

Devin R.Verified buyer
★★★★★

"Scanned the QR on the vial and the report was right there. That alone puts them ahead of everyone."

Priya N.Verified buyer
★★★★★

"Third vendor I've tried. First one where the vial actually looks like a finished product."

Marcus T.Verified buyer
★★★★★

"Cold-packed, sealed, batch number printed on the label. This is how it should be done."

Elena V.Verified buyer
Made in the USA

Ask where your vial has been.

Their route
Overseas bulk factory
unknown origin, unknown purity
Cargo hold · customs · reseller
weeks in transit, no temperature control
Relabeled and drop-shipped
no batch record, no accountability
The nuflow route
US cleanroom synthesis
cGMP methodology, single source
Independent US lab verification
CoA published before it ships
Cold-chain to your door
sealed, traceable, days not weeks

Questions, answered

How do I verify what's in my vial?+

Every vial carries a QR code linked to its batch certificate of analysis — an independent lab report showing purity, potency, and identity for your exact lot.

Who runs your third-party testing?+

Accredited, independent US laboratories. We never self-certify; every number on the certificate comes from a lab we don't own.

How should I store my peptides?+

Lyophilized vials are stable at room temperature in transit and store best refrigerated. After reconstitution, keep refrigerated and follow the guidance on your product page.

What if my order is lost or damaged?+

Every order ships with delivery protection. Lost, damaged, or stolen packages are replaced at no cost — no questions asked.

How fast is shipping?+

Orders placed before 2pm ET ship same day. Free shipping on orders over $200.