Ingredient or product comparison
GHK-Cu Quality: Product Comparison
Real Peptides Small-batch SPPS with manual pH control AAS on every lot (≥92% chelation) Yes. ICP-MS via Intertek EC50 variance <15% between batches Industry-leading verification across synthesis, chelation, and bioactivity. The standard for replication-critica
This source-based comparison does not add ratings or recommend a winner.
- Real Peptides
- Small-batch SPPS with manual pH control
- AAS on every lot (≥92% chelation)
- Yes. ICP-MS via Intertek
- EC50 variance <15% between batches
- Industry-leading verification across synthesis, chelation, and bioactivity. The standard for replication-critical research
- Supplier B
- Automated SPPS
- COA claims only (no chelation assay)
- No
- Not specified
- Adequate sequence purity but no copper binding verification. Risk of 30–40% potency variation
- Supplier C
- Large-batch automated synthesis
- Colorimetric copper test (±25% accuracy)
- Partial. HPLC only
- Economical for preliminary studies but insufficient precision for dose-response work or publication-grade experiments
- Supplier D
- Contract synthesis (variable manufacturers)
- Manufacturer-dependent
- Inconsistent
- Copper content and purity vary significantly by lot. Replication failures common