Bronchogen is a synthetic tetrapeptide — Ala-Glu-Asp-Leu (AEDL), roughly 446 Da, molecular formula C18H30N4O9 — that Vladimir Khavinson's St. Petersburg group derived from amino-acid analysis of bronchial tissue. That origin story is exactly where most buyers go wrong: the natural parent is a lung/bronchial peptide extract, while Bronchogen is the short synthetic analog whose published record is a small set of preclinical rat and in-vitro studies. Anyone shopping for one should be certain they are not paying for the other.
This guide covers what Bronchogen typically costs on the research market, how to verify a certificate of analysis for a peptide this simple, and — most importantly — how to confirm the vial actually contains the AEDL tetrapeptide and not a mislabeled tissue extract or a different Khavinson peptide. Bronchogen is niche enough that vendor quality varies a lot, so recognizing a real COA is the single most useful skill here.
Research-context information only. Bronchogen is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
Affiliate disclosure: Some links below route to vendor partners, and we may earn a commission if you buy through them at no extra cost to you. That never changes what we report about a vendor's COA, pricing, or track record. All products discussed are research chemicals labeled "not for human consumption."
This is not a ranked vendor list — for that, see our Best Bronchogen Vendors comparison. This guide teaches you how to evaluate any vendor yourself.
Understanding Bronchogen Pricing
Bronchogen is sold as a lyophilized (freeze-dried) powder in sealed glass vials, most commonly in 20mg sizes. Because it is a niche Khavinson bioregulator rather than a mainstream peptide, fewer vendors stock it, and prices are less compressed than they are for high-volume compounds like BPC-157 or semaglutide. That means two things: per-mg pricing swings more from vendor to vendor, and vial-size selection matters less than simply finding a reputable seller with a real COA.
Current Market Pricing (2026)
The ranges below reflect typical research-market listings, not any single vendor's exact number (which goes stale). For live per-mg pricing, use the comparison pages linked under the table.
| Vial Size | Typical Price Range | Price Per mg | Value Notes |
|---|---|---|---|
| 5 mg | $18-45 | $3.60-9/mg | Highest per-mg cost — identity/quality testing |
| 10 mg | $25-60 | $2.50-6/mg | Middle-of-the-road per-mg value |
| 20 mg | $40-90 | $2.92-3.25/mg | Most common vial; best per-mg value |
The pattern is the usual one: the larger vial lowers the per-mg cost because base synthesis cost is nearly flat, but the spread is smaller than it is for cheaper peptides — the bigger variable for Bronchogen is which vendor, not which vial. This guide deliberately does not translate those vials into a course cost or a milligram schedule; how a vial gets reconstituted and portioned is covered separately in the Bronchogen reconstitution guide.
For current vendor-specific pricing with exact $/mg breakdowns, see our Best Bronchogen Vendors comparison.
How to Verify Bronchogen Quality
Bronchogen is a four-amino-acid peptide with molecular formula C18H30N4O9 and a molecular weight of about 446 Da. It is short, simple, and cheap to synthesize — which means a legitimate certificate of analysis is easy for any competent vendor to produce, and the absence of one is a red flag rather than an excuse. The bigger verification challenge with Bronchogen is not purity; it is identity. The goal is to confirm the vial contains the AEDL tetrapeptide and not a mislabeled bronchial tissue extract or an unrelated Khavinson peptide.
What a COA (Certificate of Analysis) Should Include
Identity Confirmation
- Mass spectrometry confirming the correct molecular weight (about 446 Da; molecular formula C18H30N4O9)
- Amino-acid sequence verification matching Ala-Glu-Asp-Leu (AEDL)
Purity Testing
- HPLC purity — look for 98%+ purity
- The chromatogram should show a single dominant peak with minimal impurities
Contamination Testing
- Endotoxin levels (bacterial contamination)
- Residual solvent analysis (acetonitrile, TFA)
- Heavy-metals screening
How to Verify a COA Is Legitimate
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Check the testing lab — Reputable third-party labs include Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals. Avoid vendors who only show "in-house" testing.
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Verify on the lab's website — Janoshik COAs carry a task number that can be looked up directly at janoshik.com.
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Check the date — A COA should be recent (within about 6 months) and not a years-old document reused across batches.
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Match the batch — The batch/lot number on the COA should match what is printed on the vial.
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Look for the original PDF — Full PDFs with lab letterhead and signatures are much harder to fake than a cropped screenshot.
Red Flags to Avoid
- No COA available — inexcusable for a peptide this cheap to synthesize and test
- Only in-house testing — self-reported purity numbers are meaningless
- Product sold simply as a "lung peptide," "bronchi extract," or under a tissue-complex brand name — that is the extract or an unspecified product, not the AEDL tetrapeptide; confirm the sequence
- A COA whose mass does not match ~446 Da — the vial may hold a different lung peptide or the wrong compound entirely
- No contact information — legitimate vendors have real customer service
- No return or reship policy — reputable vendors stand behind their products
