Research peptides, with every certificate published.
All 30 Certificates of Analysis are free to read before you order — from two independent laboratories, one ISO 17025:2017 accredited. Published lots measure 98.62–99.97%, and we publish the ones that land under our own 99% target too.
Most-researched compounds
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Best Seller
Weight ManagementRetatrutide
5mg · 10mg +2 Price range: $69.00 through $199.00 -
Best Seller
Growth & PerformanceTesamorelin
$99.00 -
Best Seller
Weight ManagementTirzepatide
10mg · 15mg +2 Price range: $99.00 through $229.00 -
Best Seller
Other PeptidesGLOW
$129.00 -
Best Seller
Healing & RecoveryGHK-Cu
$49.00 -
Best Seller
Longevity & CognitiveNAD+
$89.00
What ships, and what backs it
Lyophilized and sealed
Freeze-dried and vacuum-sealed, which is what keeps a peptide stable in transit rather than a solution racing a clock.
Cold-chain, plain box
Insulated packaging with a cold pack, dispatched from the US in 24–48 business hours with tracking. No product or company branding on the label.
Damaged or wrong, we fix it
Tell us within 7 days and we replace it or refund in full. Unopened, sealed vials are returnable for 30 days. The policy in full.
A person answers
Questions before or after an order go to [email protected] and get a reply from someone who can look up your lot.
Every lot, on the record
Purity you can’t verify is just a number on a label. Every lot is tested by two independent laboratories — one of them ISO 17025:2017 accredited — and all 30 certificates are published here in full, including the lots that miss our target. How we test →
Purity, measured
Vanguard Laboratory, ISO 17025:2017 accredited, reports purity and net quantity with a stated measurement uncertainty — the real number for that batch, with its error.
Identity, confirmed
Freedom Diagnostics confirms by LC-MS that the vial holds the compound on the label — the test that catches a substituted product, not just an impure one.
Tracked by lot
Every vial carries a lot number tied to its COA and batch record — no mystery sourcing, no blended batches.
Held to 99%+
Our release target is 99%+ purity. Published lots measure 98.62–99.97% — we publish the certificate either way, including the lots that land under it. Check yours before you buy.
How we compare
| Miami Peptide Lab | Common in this category | |
|---|---|---|
| Certificates available before you order | All 30, free to download | On request, if at all |
| Testing laboratory named | On every certificate | Usually unnamed |
| Lot number tying vial to document | ✓ | Often missing |
| Lots that miss the purity target | Published anyway | Not published |
| Identity confirmed by mass, not just purity | LC-MS | Purity only |
| Every price and size on one page | Published | Per product only |
Frequently asked
What does “Research Use Only” mean?
All products are sold strictly for laboratory and research use. They are not for human or animal consumption, nor for therapeutic, diagnostic, or cosmetic use, and must be handled by qualified professionals in a controlled research setting.
Are your peptides lab-tested?
Yes, by two independent laboratories — Freedom Diagnostics (HPLC-UV purity with LC-MS identity) and Vanguard Laboratory, which is ISO 17025 accredited. Every Certificate of Analysis is published on the site as a free download, including the raw chromatogram and lot number, so you can check the measured figure for a product before you order. Published lots currently measure 98.62–99.97% against a 99% release target.
How are orders shipped?
Orders ship from the US within 24–48 business hours with tracking, in discreet, plain packaging. Peptides are shipped lyophilized and sealed.
What payment methods do you accept?
We accept PayPal at checkout, with more options coming soon. Your order is confirmed as soon as payment is received.
How should peptides be stored?
Store lyophilized vials cold and away from light. Once reconstituted, keep refrigerated and use within the timeframe appropriate for your research protocol.
