Source comparison
Real Peptides TB-500 vs Competitors: Quality Comparison
Third-Party COA Yes. ISO 17025 certified lab, full chromatogram included In-house only. No external validation Not provided. 'available upon request' never fulfilled Yes. Accredited external lab Real Peptides and Supplier C meet research-grade standards; in-ho
This comparison does not assign a generated winner or score.
- Third-Party COA
- Yes. ISO 17025 certified lab, full chromatogram included
- In-house only. No external validation
- Not provided. 'available upon request' never fulfilled
- Yes. Accredited external lab
- Real Peptides and Supplier C meet research-grade standards; in-house COAs from Supplier A can't verify independence; Supplier B lacks transparency
- HPLC Purity
- ≥99.1% verified
- Claims ≥98%, actual testing shows 92–95%
- Not disclosed. Likely 85–90%
- ≥98.5% verified
- Real Peptides' 99%+ purity ensures minimal inactive analogs; Supplier A's variance suggests bulk manufacturing inconsistency
- Synthesis Method
- Small-batch SPPS (5–10g batches)
- Large-scale contract manufacturing (50–100g)
- Industrial bulk synthesis (500g+)
- Small-batch SPPS (10–15g)
- Small-batch methods (Real Peptides, Supplier C) produce superior sequence accuracy and batch consistency
- Storage & Shipping
- Cold-chain with temp loggers, −20°C warehouse
- Gel ice packs, no temp monitoring
- Room-temp international shipping
- Cold-chain, no logger verification
- Real Peptides' logged cold-chain prevents undetected degradation; Supplier C uses cold-chain but lacks verification data
- Reconstitution Support
- Bacteriostatic water included, protocol documentation
- Not included. Buyer sources separately
- None provided
- Included with premium tier only
- Real Peptides includes everything needed for immediate use; sourcing BAC water separately introduces contamination risk
- Batch Traceability
- Unique lot number, synthesis date recorded
- Generic lot number, no synthesis date
- No lot tracking
- Lot number with synthesis quarter
- Real Peptides' full traceability allows precise shelf-life calculation; Supplier C provides partial data
- Price per 5mg
- $78
- $52
- $31
- $95
- Real Peptides sits mid-range; Supplier B's low price correlates with underdosing; Supplier C charges premium without significant quality advantage over Real Peptides