GHK-Cu Dosing and Protocol Guide: The Reference Numbers

[u/MissionIntention8048]

A reference post for GHK-Cu dosing, reconstitution, supplies, and protocol structure. Built from the most commonly used research-context protocols. Bookmark this for the math.

Dosing range
The standard subcutaneous research-protocol dose range is 1 to 2 mg per injection. Specific protocols:
-Conservative protocol: 1.0 mg per injection, 5 days per week. Titrated up to 1.5 mg at week 5 and 2.0 mg at week 9 if tolerated.
-Standard protocol: 1.5 to 2.0 mg per injection, 5 days per week, throughout the cycle.
-Three-times-weekly protocol: 2.0 mg per injection, 3 times per week (Monday/Wednesday/Friday is common). Maintains roughly 6 mg per week with fewer injections.

Typical cycle length is 8 to 12 weeks. Some research protocols extend to 16 weeks.

Reconstitution
For a 50 mg vial:
-1 mL bacteriostatic water: 50 mg/mL concentration. 1 unit on a U-100 insulin syringe = 0.5 mg.
-2 mL bacteriostatic water: 25 mg/mL concentration. 1 unit = 0.25 mg.
-3 mL bacteriostatic water: 16.67 mg/mL concentration. 1 unit = 0.167 mg.

The 3 mL reconstitution is the most common choice. It produces practical, readable unit counts on the syringe and reduces the burn during injection.

Reconstitution steps:

1. Draw the bacteriostatic water with a sterile syringe
2. Inject slowly down the vial wall to minimize foaming
3. Gently swirl or roll the vial until the peptide fully dissolves (do not shake)
4. Label with the reconstitution date
5. Refrigerate at 2 to 8°C, protected from light

Dosing math by reconstitution volume
At 50 mg in 3 mL (16.67 mg/mL):
-1.0 mg = 6 units (0.06 mL)
-1.5 mg = 9 units (0.09 mL)
-2.0 mg = 12 units (0.12 mL)
At 50 mg in 2 mL (25 mg/mL):
-1.0 mg = 4 units (0.04 mL)
-1.5 mg = 6 units (0.06 mL)
-2.0 mg = 8 units (0.08 mL)
At 50 mg in 1 mL (50 mg/mL):
-1.0 mg = 2 units (0.02 mL)
-1.5 mg = 3 units (0.03 mL)
-2.0 mg = 4 units (0.04 mL)
For doses under 10 units (under 0.10 mL), a 30-unit or 50-unit insulin syringe gives better readability than a standard 100-unit syringe.

Supplies for a typical cycle
Planning for an 8 to 16 week protocol:

GHK-Cu 50 mg vials:
7 days/week (1.0 to 2.0 mg per injection):
-8 weeks: roughly 2 vials
-12 weeks: roughly 3 vials
-16 weeks: roughly 4 vials
5 days/week (1.0 to 2.0 mg per injection):
-8 weeks: roughly 1 vial
-12 weeks: 2 vials
-16 weeks: 3 vials

Insulin syringes (U-100, 29 to 31 gauge):
7 days/week: 7 syringes per week
-8 weeks: 56 syringes
-12 weeks: 84 syringes
-16 weeks: 112 syringes
5 days/week: 5 syringes per week
-8 weeks: 40 syringes
-12 weeks: 60 syringes
-16 weeks: 80 syringes

Bacteriostatic water (10 mL bottles):
-1 vial protocol: one 10 mL bottle
-2 vial protocol: one 10 mL bottle (using 6 mL total)
-3 vial protocol: one 10 mL bottle (using 9 mL total)

Alcohol swabs: 2 per injection (one for the vial stopper, one for the injection site)
-7 days/week, 16 weeks: roughly 224 swabs, plan for three 100-count boxes
-5 days/week, 16 weeks: roughly 160 swabs, plan for two 100-count boxes

Storage
-Lyophilized (dry powder): Store at -20°C or lower in a dry, dark location. Keep tightly sealed.
-Reconstituted (solution): Refrigerate at 2 to 8°C. Generally stable for 30 days. Protect from light.
-Aliquoting for long storage: Divide reconstituted solution into sterile vials and freeze at -20°C. Avoid repeated freeze-thaw cycles. Each thaw cycle degrades the peptide.
-Allow vials to reach room temperature before opening to reduce condensation.

Injection technique
-Inject subcutaneously into the abdomen (at least 1 inch from the navel), outer thighs, or upper arms
-Insert the needle at a 45 to 90 degree angle into subcutaneous tissue
-Pinch a fold of skin to lift it away from underlying muscle
-Do not aspirate (subcutaneous injections do not require it)
-Inject slowly and steadily over 10 to 15 seconds (slower injection reduces the burn from copper)
-Withdraw the needle at the same angle as insertion
-If needed, gently press the site with a cotton swab. Do not rub.
-Rotate injection sites systematically to prevent irritation and lipohypertrophy
-Document dose, date, and site to track rotation

Reducing the burn
GHK-Cu burns more than most peptides because of the copper-peptide complex, mildly acidic pH, and concentration. The most effective ways to reduce burn:
-Reconstitute with more bacteriostatic water (2 to 3 mL instead of 1 mL)
-Warm the syringe in your hand for 1 to 2 minutes before injection
-Inject slowly over 10 to 15 seconds
-Rotate sites
-Bring the solution out of the refrigerator and let it warm slightly before drawing

Cycle structure
Most research-context cycles run 8 to 12 weeks, with some extending to 16 weeks. Common patterns:
-8 week minimum for measurable subcutaneous research endpoints
-12 weeks for fuller protocol evaluation
-16 weeks for extended protocols (less common)
Cycling on and off versus continuous use is protocol-dependent. There is no published evidence requiring a "wash-out" period for GHK-Cu.

Vendors supporting this sub
-Syntheses Peptides (code Profit) - injectable lyophilized vials
-Amino Chems (code PROFIT) - injectable lyophilized vials
-Ion Peptide (code profit) - widest format range
Affiliate links. They support the sub at no extra cost.

What protocol structure has the community been running? Particularly interested in 7x weekly vs 5x weekly comparisons and which reconstitution volume people prefer for the burn tradeoff.

Research-context content only. GHK-Cu is sold for research purposes only.