Receptor Chem vs Risynth Bio: Peptide Vendor Comparison 2026
Compare Receptor Chem and Risynth Bio — mid vs mid pricing, COA-verified/non-verified testing, 0 shared peptides.
Receptor Chem
Location: UK
Peptides: 1
COA: ✓ Available
Third-party tested: ✓ Yes
Top peptides:
- • MK-677
Risynth Bio
Location: Unknown
Peptides: 1
COA: ✗ Not Available
Third-party tested: ✓ Yes
Top peptides:
- • Research Peptides
Comparison Overview
Both Receptor Chem and Risynth Bio compete in the mid market segment. Receptor Chem offers with COA availability and is third-party tested, while Risynth Bio is without published COAs and third-party tested. Both offer shipping to multiple regions; Receptor Chem has a reputation score of 4.3/5 vs Risynth Bio's 4.5/5.
Key Metrics
| Metric | Receptor Chem | Risynth Bio |
|---|---|---|
| Established | 2018 | |
| Location | UK | Unknown |
| Price Tier | mid | mid |
| Reputation Score | 4.3/5 | 4.5/5 |
| COA Available | ✓ Yes | ✗ No |
| Third-Party Tested | ✓ Yes | ✓ Yes |
| Shipping Regions | UK, Europe, International | Unknown |
| Payment Methods | credit card, bank transfer, crypto | unknown |
| Peptides Offered | 1 | 1 |
Unique to Receptor Chem
- MK-677
Unique to Risynth Bio
- Research Peptides
Receptor Chem Highlights
Strengths
- Highly respected UK-based vendor with excellent quality reputation
- Comprehensive testing — Mass Spec, HPLC, FTIR, NMR
- 99%+ purity on all products
Considerations
- Primarily a SARMs vendor — very limited peptide selection
- Only MK-677 as a peptide-adjacent compound
Risynth Bio Highlights
Strengths
- High Finnrick purity score (9.1/10)
- Top Finnrick rating (A)
Considerations
- Limited community reputation data
Which Vendor to Choose?
Risynth Bio has been in business longer, offering more operational history.
⚠️ Important: This comparison is for informational purposes only. Research peptides responsibly and consult appropriate medical professionals. The Peptide Index does not endorse any vendor.
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