Not approved (research only)Relaxin-2 analogFibrosis research
B7-33 (relaxin-2 analog)
B7-33 is a single-chain analog of the B chain of relaxin-2, studied in animal models of fibrosis.
What is B7-33?
B7-33 is a single-chain analog of the B chain of relaxin-2, studied in animal models of fibrosis. B7-33 (relaxin-2 analog) is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.
Key takeaways
- B7-33 (relaxin-2 analog) is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.
- B7-33 has little indexed research under its own name; we list only papers whose titles name it.
- 3 vendors in our directory listed B7-33 in their public catalog on October 19, 2026.
Regulatory & access status
B7-33 (relaxin-2 analog) is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.
Sellers that market unapproved peptides for human use can receive FDA warning letters; our vendor directory links any letter we found on fda.gov.
How much research exists on B7-33 (relaxin-2 analog)?
B7-33 (relaxin-2 analog) has no reliable PubMed search term of its own (the name is shared with unrelated terms), so we list only papers whose titles name it. Search PubMed.
Most relevant recent papers
- Coatings Releasing the Relaxin Peptide Analogue B7-33 Reduce Fibrotic Encapsulation. — ACS Appl Mater Interfaces, 2019
- B7-33, a Functionally Selective Relaxin Receptor 1 Agonist, Attenuates Myocardial Infarction-Related Adverse Cardiac Remodeling in Mice. — J Am Heart Assoc, 2020
- The single-chain relaxin mimetic, B7-33, maintains the cardioprotective effects of relaxin and more rapidly reduces left ventricular fibrosis compared to perindopril in an experimental model of cardiomyopathy. — Biomed Pharmacother, 2023
- B7-33 replicates the vasoprotective functions of human relaxin-2 (serelaxin). — Eur J Pharmacol, 2017
What the evidence does not show
- Paper counts measure research attention, not whether B7-33 works or is safe.
- No clinical trial in humans is tagged in PubMed under this name.
- No FDA review of any "research use only" product's identity, purity, sterility or dose.
Research suppliers that list B7-33
3 vendors in our directory listed a product matching B7-33 in their public catalog on October 19, 2026. Listed alphabetically; a listing is not an endorsement. Research use only.
Prices per mg, where we could verify them, are on our price comparison.
B7-33 reconstitution math
Lab arithmetic only, not dosing guidance: use the peptide calculator to turn a vial size and diluent volume into a concentration.
B7-33 FAQ
Is B7-33 FDA-approved?
B7-33 (relaxin-2 analog) is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.
Is B7-33 safe?
There are no published human safety trials of B7-33 that we could find. Products sold as "research use only" have no FDA review of purity, sterility or dose, and are not for human use.
How much research is there on B7-33?
B7-33 has little indexed research under its own name; we list only papers whose titles name it.
Who sells B7-33?
Biotech Peptides, Core Peptides, Peptide Worldwide listed it on their public catalogs when we checked; a listing is not an endorsement.
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