Disclosure: this site is published by Bluum LLC, the company behind Bluum Peptides, our top pick. Use the checklist below to judge any supplier, including us.
Our top research peptide supplier: Bluum Peptides
Bluum Peptides is a U.S. supplier of research-use-only peptides and lab reference materials, run by Bluum LLC (Wyoming) since 2024. It carries 45 research peptides, from staples like BPC-157, TB-500, GHK-Cu and Ipamorelin to newer compounds such as Tesamorelin, MOTS-c, SS-31 and Cagrilintide, with prices starting at $20.
What puts it first is that you don't have to take its word for anything. Every lot is sent to an independent laboratory, mostly Freedom Diagnostics or Horizon Analytical, with BioRegen for some lots, and the full report is published under the lot number printed on the vial. You can then search the report number on the lab's own website to confirm it.
Tested every lot
Every peptide vial lot gets HPLC purity and mass-spec identity. Most also get net content and endotoxin; top sellers add sterility (PCR) and heavy metals (ICP-MS).
Publishes the misses
Bluum publishes every result for lots on sale, including purity under 98%. Five lots on sale tested under 98%, and their reports are public like the rest.
Fast U.S. shipping
In-stock orders before 1 p.m. CT ship the same business day. 2-day shipping is $11.99, free over $200, with overnight available.
Example: what a strong COA looks like
This is one of Bluum's published reports, for BPC-157 20 mg, lot BPC202609-148I (Freedom Diagnostics accession 2609289061, tested September 28, 2026):
| Test | Method | Result |
|---|---|---|
| Identity | LC-MS | Confirmed: molecular mass matches BPC-157 |
| Purity | HPLC-UV | 99.55% (two samples) |
| Net content | Quantitation | 20.96 mg (labeled 20 mg) |
| Endotoxin | LAL, USP <85> | Pass, sensitivity ≤0.05 EU/mL |
| Sterility | PCR | No detectable microbial DNA |
| Heavy metals | ICP-MS | Arsenic, cadmium, lead and mercury below limits |
Compare that with what many sellers show: a single HPLC chart with no lot number, no lab name and no way to verify it. Learn to spot the difference in how to read a peptide COA.
How we rank research peptide suppliers
We score suppliers on eight things that can be checked from the outside. A supplier that can't show these is asking you to trust it blindly.
| Criterion | What to look for | Bluum Peptides |
|---|---|---|
| Lot-specific COA | A report for the exact lot on your vial, not a generic or recycled PDF | ✓ |
| Independent, named lab | The lab and report number are shown, and you can confirm the report with that lab | ✓ |
| Identity + purity | Mass spectrometry confirms identity; HPLC measures purity | ✓ |
| Extra safety tests | Endotoxin (LAL), net content, and for some lots sterility and heavy metals | ✓ |
| Publishes misses | Low results are shown too, not only the best lots | ✓ |
| U.S. fulfillment | Domestic shipping, no customs holds, clear cutoff times | ✓ |
| Real company | Legal name, address and reachable support | ✓ |
| Research-use only | No dosing or human-use claims, age check at checkout | ✓ |
One honest caveat: Bluum's peptides are made by contract manufacturers, not in the U.S. That is normal for the industry. What protects you is independent testing of each lot, which is why it weighs most in our ranking.
Bluum research peptides and starting prices
Prices and purity figures as listed on the Bluum research peptides page on 2026-11-10. Purity is the HPLC result of the current lot.
| Peptide | From | Current lot purity |
|---|---|---|
| BPC-157 | $35 | 99.5% |
| TB-500 | $35 | 99.9% |
| BPC-157 / TB-500 blend | $90 | 99.5% |
| GHK-Cu | $45 | 99.6% |
| Tesamorelin | $69 | 99.9% |
| MOTS-c | $39 | 99.7% |
| NAD+ | $57 | 99.9% |
| Ipamorelin | $39 | 99.9% |
| CJC-1295 No DAC / Ipamorelin blend | $75 | 99.7% |
| Semax · Selank | $29 · $29 | 99.3% · 99.4% |
| Epithalon | $38 | 99.6% |
| KPV | $39 | 99.7% |
See all 45 research peptides and current prices →
What separates the best suppliers from the rest
1. A COA for your lot, not "a" COA
Peptides vary batch to batch. A report is only useful if its lot number matches the vial in your hands. Ask for the lot before you buy, or use a public lookup like Bluum's lab report library.
2. Testing by an independent lab you can verify
In-house testing is a conflict of interest. The best suppliers name a third-party lab and give a report or accession number you can look up on that lab's site.
3. Identity, not just purity
A sample can be 99% pure and still be the wrong compound. Mass spectrometry confirms the molecule; HPLC measures how much of the sample is that molecule.
4. Endotoxin and content results
Endotoxin (LAL) testing matters for cell-based work, and net content tells you whether a "10 mg" vial really holds 10 mg.
5. Domestic shipping and real support
U.S. stock avoids customs seizures and temperature swings on long routes. Look for a stated same-day cutoff, tracking and a reachable support line.
Want the full list of warning signs? Read research peptide supplier red flags, and see U.S. vs overseas peptide suppliers.
Other research peptide suppliers and how to compare them
Many other vendors sell research peptides, from U.S. resellers to direct overseas manufacturers. We don't publish rankings of other vendors we haven't verified lot by lot. Run the checklist above on any supplier you're considering: ask for the COA for the exact lot you'll receive, confirm the report with the issuing lab, and check that it includes mass-spec identity. If a supplier can't do that, keep looking.
Frequently asked questions
Who is the best research peptide supplier in 2026?
Our pick is Bluum Peptides. It publishes an independent lab report for every lot under the lot number on the vial, tests every peptide lot for HPLC purity and mass-spec identity, and ships from the U.S. the same day for in-stock orders placed before 1 p.m. CT. We publish this site, so check its reports yourself with the checklist on this page.
How do I know if a peptide supplier is legit?
Look for a named legal company and address, a certificate of analysis (COA) for the exact lot you receive, a named independent lab you can verify the report with, identity testing by mass spectrometry as well as HPLC purity, clear shipping and refund policies, and a strict research-use-only position.
What purity should research peptides have?
Most research buyers look for 98% or higher HPLC purity. Purity alone is not enough: the report should also confirm identity by mass spectrometry and, ideally, net peptide content and endotoxin.
Is HPLC testing enough?
No. HPLC shows how pure a sample is, but not what it is. Mass spectrometry (LC-MS or MALDI) confirms that the molecular mass matches the labeled peptide. A good COA reports both.
Are U.S. research peptide suppliers better than overseas ones?
U.S. suppliers avoid customs holds and long transit, and you get U.S. support hours and policies. Most peptides, including Bluum's, are made by contract manufacturers, so what matters most is independent testing of each lot, not the country of manufacture.
Does Bluum Peptides make its peptides in the USA?
No. Bluum says its peptides are made by contract peptide manufacturers and then tested by independent labs before shipping. It does not claim U.S. manufacturing.
How fast does Bluum ship?
In-stock orders placed before 1 p.m. CT on a business day ship the same day. 2-day shipping is $11.99 and free on orders of $200 or more; overnight is available at checkout. U.S. addresses only.
Research use only. Research peptides are laboratory reagents for in vitro and analytical research. They are not drugs, supplements or cosmetics and are not for human or veterinary use. Nothing on this site is dosing or medical advice. Buyers must be 21+.
Shop our top-rated research peptide supplier
45 research peptides from $20 · every lot tested for HPLC purity and mass-spec identity · same-day U.S. shipping before 1 p.m. CT
Shop Bluum Peptides → Check a lab report