Ingredient or product comparison
GHK-Cu Anti-Aging Protocol Dosage Timing: Research Comparison
Single Evening Dose 200–300µg once daily 60–90 minutes before sleep Aligns with nocturnal GH pulse and peak dermal collagen synthesis (11 PM–3 AM); maximizes synergistic anabolic signaling Low. One injection daily Best for experienced researchers prioritizing
This source-based comparison does not add ratings or recommend a winner.
- Single Evening Dose
- 200–300µg once daily
- 60–90 minutes before sleep
- Aligns with nocturnal GH pulse and peak dermal collagen synthesis (11 PM–3 AM); maximizes synergistic anabolic signaling
- Low. One injection daily
- Best for experienced researchers prioritizing visible results; requires precise timing and fresh reconstitution
- Split Morning/Evening
- 150µg twice daily
- Upon waking (fasted) and 2–3 hours after dinner
- Extends tissue exposure across two windows; balances anti-inflammatory effects with collagen synthesis
- Moderate. Two daily injections
- Safest for beginners; reduces risk of wasted product from poor technique; more forgiving timing windows
- Pre-Workout Timing
- 200µg 30–45 min before resistance training
- Timed to exercise-induced GH release
- Leverages acute GH spike from compound lifts; targets muscle repair and connective tissue remodeling
- High. Requires workout consistency
- Experimental; limited evidence for superiority over evening dosing; useful for joint/tendon repair focus
- Cyclical Dosing (5 days on, 2 off)
- 250–300µg once daily (evening)
- 60–90 minutes before sleep on dosing days
- Prevents receptor downregulation; allows endogenous copper homeostasis reset
- Moderate. Requires tracking
- Supported by anecdotal reports; no clinical evidence for improved outcomes vs continuous dosing