What dose does this GHK-Cu calculator use by default?

It starts from the first supported mg/mcg protocol in the MeinePeptide monograph, preferring beginner, then standard, then advanced protocols.

How much bacteriostatic water should I compare?

The chart compares 1 ml, 2 ml, and 3 ml because these are common reconstitution volumes. The interactive calculator lets you enter any volume.

Topical or injectable?

For skin, the topical case is stronger and the side-effect ceiling is lower. Injectable becomes more interesting if your goal is systemic — joints, hair, general anti-aging — but the evidence there is anecdotal.

Do I need a separate copper supplement?

No. The peptide is named GHK-Cu because the copper is already bound. Additional supplementation can disrupt the binding and isn't needed for the peptide to work.

Back to GHK-CuPeptide-specific calculator

GHK-Cu dosage calculator

Calculate GHK-Cu concentration, syringe units, doses per vial, and vial longevity from the protocol data.

Target dose per injection: 1 mgFrequency: Twice weeklyStatic chart: 5 mg vial

The chart is educational math only. Use clinician-directed instructions for real treatment decisions.

Prefilled calculator

Reconstitution & dosage calculator

Use the prefilled calculator for the current protocol, then compare common bacteriostatic-water volumes in the static chart below.

Peptide

Peptide quantity (mg)

Bacteriostatic water (ml)

Target dose per injection

Unit

Frequency

Syringe size

Concentration

2.5 mg/ml

Units to draw per dose40

ml per dose0.4 ml

Doses per vial5

Days a vial lasts18

Syringe

Fill to 40 units on a 1 ml syringe.

Static chart: 5 mg vial

Reconstitution chart

Common bacteriostatic-water options for the starting protocol.

Bacteriostatic water (ml)	Concentration	Units to draw per dose	ml per dose	Doses per vial	Days a vial lasts
1 ml	5 mg/ml	20	0.2 ml	5	35
2 ml	2.5 mg/ml	40	0.4 ml	5	35
3 ml	1.667 mg/ml	60	0.6 ml	5	35

Protocol table

Advanced

3 mg

three times weekly

Routesubcut

Injection timing12 weeks on / 4 weeks off

Beginner

1 mg

twice weekly

Routesubcut

Injection timing8 weeks on / 4 weeks off

Standard

2 mg

three times weekly

Routesubcut

Injection timing8 weeks on / 4 weeks off

Safety summary

Contraindications

Wilson disease — copper handling is exactly what you don't want to challenge in someone whose body cannot clear it
Active cancer — the peptide promotes angiogenesis and tissue regeneration, both of which are double-edged in this context
Pregnancy and breastfeeding — no safety data
Caution if you're already supplementing copper at high doses; the peptide brings its own

Side effects

mildInjection-site soreness or a small bluish bump that resolves in 24–48 hours — the copper colour is normal.
mildTopical irritation in sensitive skin, usually from the carrier rather than the peptide.
mildTransient drop in blood pressure with high subcutaneous doses in some users — minor, but worth noting if you're already on antihypertensives.
moderateNo long-term human safety data for injectable use at the doses people are running.

GHK-Cu

The copper-binding tripeptide your skin loses with age. Strongest evidence is topical for skin and wound healing; injectable use is mostly anecdotal.

Read full monograph