Ingredient or product comparison
GHK-Cu for Eyebrow Thinning Research: Comparison of Peptide Grades
Before selecting a GHK-Cu source for follicular research, understanding how different peptide grades perform under controlled conditions is essential. Research-Grade (≥95%) ≥95% Yes. Spectrophotometry confirmation Stable 72+ hours when lyophilised and refriger
This source-based comparison does not add ratings or recommend a winner.
- Before selecting a GHK-Cu source for follicular research, understanding how different peptide grades perform under controlled conditions is essential.
- Research-Grade (≥95%)
- ≥95%
- Yes. Spectrophotometry confirmation
- Stable 72+ hours when lyophilised and refrigerated
- In vitro follicular studies, dermal papilla cell assays
- Required for reproducible mechanistic research. Only grade with verifiable bioactivity
- Cosmetic-Grade (60–85%)
- 60–85%
- Rarely verified
- Degrades 40–60% within 24 hours at room temperature
- Consumer serums, topical formulations
- Insufficient purity for controlled research. Contains competing inactive analogs
- Pharmaceutical-Grade (≥98%)
- ≥98%
- Yes. Batch-level QC
- Stable under GMP storage (2–8°C, ≤12 months)
- Clinical trial formulations, therapeutic applications
- Exceeds research requirements. Typically cost-prohibitive for exploratory studies
- Unchelated GHK (Free Peptide)
- Variable (70–95%)
- No. Copper absent
- Rapidly degrades without copper protection
- Academic synthesis, custom formulation development
- Requires immediate copper chelation post-synthesis. Not suitable for direct application