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Research Comparison

ARA 290 vs BPC-157

ARA 290 and BPC-157 are studied in overlapping research areas, which is why they are frequently compared. This is a neutral side-by-side reference drawn from published preclinical literature and laboratory handling data.

Shared research areas:Tissue Regeneration
Class11-amino-acid EPO-derived linear peptideSynthetic pentadecapeptide (15 residues), acetate salt
Molecular weight1257.4 g/mol1419.53 g/mol
CAS numberNot assigned / not specified137525-51-0
Purity spec≥99%≥99%
Research areasTissue Regeneration, Cognitive & NeurologicalTissue Regeneration, Gastrointestinal
Primary diluentBacteriostatic water (0.9% benzyl alcohol)Bacteriostatic water (0.9% benzyl alcohol)
Working windowCommonly worked with for 2-4 weeks at 2-8 °C in bacteriostatic water.Commonly worked with for 3–4 weeks at 2–8 °C in bacteriostatic water.
Lead degradation routeAsparagine/glutamine deamidation is the most plausible slow route for this sequence.Aspartate isomerisation — the Asp-Ala pairs at positions 10–12 are the most plausible slow degradation route in solution over long storage.
Freeze–thawAliquot on first reconstitution; the short backbone tolerates a freeze better than folded proteins but repeated cycles still concentrate solutes at the ice interface.Tolerates freeze–thaw better than most peptides in this catalogue, but repeated cycles still concentrate solutes at the ice interface. Aliquot on first reconstitution rather than relying on that tolerance.
Light sensitivityNo specific light requirement beyond normal practice.No specific light requirement beyond normal practice.

How they actually differ

Comparing the two: ARA 290 is 11-amino-acid epo-derived linear peptide, while BPC-157 is synthetic pentadecapeptide (15 residues), acetate salt — different molecular classes with different handling consequences; their leading degradation routes differ (asparagine/glutamine deamidation is the most plausible slow route for this sequence. for ARA 290, aspartate isomerisation for BPC-157), so the storage precautions that matter are not the same; their practical working windows differ once reconstituted. The sections below set out each in full.

ARA 290 — origin

ARA 290 (Cibinetide) is an 11-residue peptide modelled on the helix-B surface of erythropoietin. It was engineered to engage the innate repair receptor — a heteromer of the EPO receptor and the beta-common receptor — without the erythropoietic (red-blood-cell-stimulating) activity of full-length EPO.

BPC-157 — origin

BPC-157 is a 15-amino-acid sequence (Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val) isolated from a larger protein found in human gastric juice. Its provenance is the reason for one of its most-cited laboratory properties: it was characterised as remaining intact in gastric-fluid conditions that rapidly hydrolyse most peptides.

ARA 290 research themes

Innate repair receptor

Studied for selective engagement of the EPOR/beta-common receptor heteromer that mediates tissue-protective signalling, distinct from the classical erythropoietic receptor.

Neuropathic pain models

A substantial share of the published literature examines small-fibre and neuropathic-pain research models.

Anti-inflammatory signalling

Investigated for modulation of inflammatory pathways in preclinical tissue-injury models.

BPC-157 research themes

Angiogenesis signalling

Preclinical work has examined interactions with VEGFR2 signalling and vessel formation in tissue models.

Gastrointestinal models

The compound's gastric-juice provenance drove an early and substantial literature in GI mucosal research models.

Tendon and connective tissue

Studies have investigated fibroblast behaviour and collagen organisation in tendon and ligament models.

Nitric-oxide pathway interaction

A recurring theme in published work is modulation of the NO system in animal models.

ARA 290 handling

  • Reach room temperature before opening the vial.
  • Add diluent gently down the vial wall; do not vortex.
  • Use low-bind labware at low working concentrations to limit adsorption.

BPC-157 handling

  • Let the sealed vial reach room temperature before breaking the seal — opening a cold vial draws in moist air and the lyophilized cake is hygroscopic.
  • Do not vortex. Swirl until the cake clears; the peptide dissolves in seconds without agitation.
  • Label aliquots with reconstitution date and diluent, since the working window depends on which solvent was used.

Both third-party tested

Every Popular Peptides batch of ARA 290 and BPC-157 is independently tested by HPLC and LC-MS with a published Certificate of Analysis. Enter a lot number to pull the COA for a specific vial.

Verify a batchPublished COAsHow we test

ARA 290 reference

Full ARA 290 reference ARA 290 storage ARA 290 reconstitution ARA 290 calculatorARA 290 product details

BPC-157 reference

Full BPC-157 reference BPC-157 storage BPC-157 reconstitution BPC-157 calculatorBPC-157 product details

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ARA 290 and BPC-157 are supplied strictly as research chemicals for in-vitro laboratory and research use only. They are not intended for human or animal consumption, diagnostic, or therapeutic use. This comparison summarizes published preclinical literature and laboratory handling data; it is not medical advice, not a claim of efficacy, and not usage guidance.