Ingredient or product comparison
GHK-Cu vs Finasteride vs Dutasteride: DHT Inhibition Compared
This comparison table puts GHK-Cu's DHT-blocking capacity in context against pharmaceutical options. Mechanism Copper ion enzyme inhibition Competitive 5-AR type 2 inhibitor Dual 5-AR type 1 + 2 inhibitor 5-AR type 1 inhibition Up to 90% (in vitro) Weak Strong
This source-based comparison does not add ratings or recommend a winner.
- This comparison table puts GHK-Cu's DHT-blocking capacity in context against pharmaceutical options.
- Mechanism
- Copper ion enzyme inhibition
- Competitive 5-AR type 2 inhibitor
- Dual 5-AR type 1 + 2 inhibitor
- 5-AR type 1 inhibition
- Up to 90% (in vitro)
- Weak
- Strong
- 5-AR type 2 inhibition
- Weak (~10% of type 1 potency)
- Strong (~70% serum DHT reduction)
- Very strong (~90% serum DHT reduction)
- Administration
- Topical, injection, microneedling
- Oral (1 mg daily)
- Oral (0.5 mg daily)
- Systemic DHT effect
- Minimal (local action)
- Significant (systemic)
- Very significant (systemic)
- None reported
- 2-4% (erectile dysfunction, decreased libido)
- 4-6% (higher than finasteride)
- Hormonal disruption
- None
- Yes (affects hormonal balance)
- Yes (more pronounced)
- Evidence for hair regrowth
- In vitro + mechanism studies
- Phase III RCTs (FDA approved)
- Phase III RCTs (off-label for hair)
- FDA approved for hair loss
- No
- Yes (Propecia)
- No (approved for BPH only)
- Cost
- $50-200/month (peptide)
- $10-30/month (generic)
- $15-50/month (generic)
- Finasteride and dutasteride are proven treatments for androgenetic alopecia with Phase III clinical trial data. GHK-Cu provides a complementary, non-hormonal mechanism targeting the isoform that finasteride misses. GHK-Cu is not a replacement for pharmaceutical DHT blockers in moderate to severe hair loss.
- For men concerned about finasteride's sexual side effects (2-4% incidence), GHK-Cu offers a side-effect-free partial contribution to DHT reduction. The potency gap is real, but for mild cases or as part of a multi-mechanism approach, copper peptides fill a useful niche.