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Limited human dataNot FDA approved

GHK-Cu dosage

Also known as: Copper peptide · Copper tripeptide-1 · GHK copper · Glycyl-L-histidyl-L-lysine copper(II) · Prezatide copper acetate · Kollaren · Liver cell growth factor

Updated 45 sources

Every GHK-Cu protocol on file, 11 in all, labelled by where each number came from. 1 have titration steps, each step is worked out in U-100 units for a 50 mg vial + 2 mL water.

Calculate with GHK-CuGHK-Cu overview

GHK-Cu dosage by goal

Grouped by goal. Each protocol shows the amount, how often, cycle and rest as the source states them, with every titration step.

Injected11

Titration

Amount
1 to 2 mg
How often
Once daily, 5 days a week
Route
SubQ, vial (powder)
Cycle
12 weeks or more
Titration steps for Titration
WhenDoseU-100 units (50 mg vial + 2 mL water)
Weeks 1 to 41 mg4 units · 0.04 mL
Weeks 5 to 81.5 mg6 units · 0.06 mL
Weeks 9 to 122 mg8 units · 0.08 mL

Three times a week

Amount
2 mg
How often
Monday, Wednesday and Friday
Route
SubQ, vial (powder)
Cycle
12 weeks or more

Starter

Amount
1 mg
How often
5 to 7 nights a week
Route
SubQ, vial (powder)
Cycle
4 weeks, then reassess

Timing: Evening by convention. No trial has tested timing.

Standard

Amount
2 mg
How often
Once daily
Route
SubQ, vial (powder)
Cycle
4 weeks on
Rest
4 weeks off

Timing: Evening by convention; other guides say morning or that it makes no difference.

Skin

Amount
1 to 2 mg
How often
5 days on, 2 off
Route
SubQ, vial (powder)
Cycle
8 to 12 weeks on
Rest
4 weeks off

Wound or injury

Amount
2 to 3 mg
How often
Once daily
Route
SubQ, vial (powder)
Cycle
4 to 8 weeks
Rest
2 to 4 weeks off

General use

Amount
0.5 to 1.5 mg
How often
Daily or every other day
Route
SubQ, vial (powder)
Cycle
30 days on
Rest
30 days off

Start low, build to maintenance

Amount
1 to 3 mg
How often
Daily, with 5 on and 2 off as an option; 1 mg in week 1, then 1 to 2 mg, up to 3 mg
Route
SubQ, vial (powder)
Cycle
8 to 12 weeks on
Rest
4 to 6 weeks off

Older guide

Amount
1 to 2 mg
How often
Once daily
Route
SubQ, vial (powder)
Cycle
30 days on
Rest
30 days off

Weight-based

Amount
15 to 30 mcg/kg
How often
Once daily
Route
SubQ, vial (powder)

Note: 1.05 to 2.1 mg for a 70 kg adult.

Microgram school

Amount
200 to 500 mcg
How often
Once daily
Route
SubQ, vial (powder)
Cycle
4 to 8 weeks on
Rest
4 to 6 weeks off

Who: A minority view: smaller doses, closer to natural plasma levels and a lower copper load. Another page of the same site gives 100 to 300 mcg.

Doses shown are what sources report, labelled by origin. Not medical advice.

Community-reported amounts

The GHK-Cu amounts people mention most on Reddit, by goal. Counts, not recommendations.
GHK-Cu amounts reported on Reddit, by goal, with mention counts
GoalMost reported amounts (mentions)
Goal not stated2 mg (94), 1 mg (61), 1.5 mg (19), 2.5 mg (15)
Skin and hair2 mg (60), 1 mg (14), 5 mg (8), 1.5 mg (7)
Injury recovery1 mg (7), 2 mg (7), 2.5 mg (3), 1.7 mg (2)
From 900 Reddit posts and comments, last mined Oct 23, 2026.

GHK-Cu dosage chart by vial size

Units to draw for the doses sources cite most, at every vial size and water volume.
GHK-Cu: concentration and U-100 syringe units for each vial size and water volume
WaterStrength1 mgdose, units2 mgdose, units3 mgdose, units
50 mg vial
2 mLCompetitor guide25 mg/mL40.04 mL80.08 mL120.12 mL
3 mLCompetitor guide16.667 mg/mL60.06 mL120.12 mL180.18 mL
5 mLCompetitor guide10 mg/mL100.1 mL200.2 mL300.3 mL
100 mg vial
3 mLCompetitor guide33.333 mg/mL30.03 mL60.06 mL90.09 mL
5 mLCompetitor guide20 mg/mL50.05 mL100.1 mL150.15 mL
Units are on a U-100 insulin syringe (100 units = 1 mL). U-50 and U-30 barrels read the same units.Water volumes from

Doses shown are what sources report, labelled by origin. Not medical advice.

Calculate with this peptideYour vial, your water, your dose: GHK-Cu in syringe units, with the math shown.

Mixing GHK-Cu

Diluent: Bacteriostatic water

Water volumes sources use: 2 mL, 3 mL, 5 mL

More water stings less. Many vials are 3 mL glass and cannot hold 5 mL; one seller ships 100 mg in a 10 mL vial. Do not use saline, which may pull copper off the peptide. Faint blue to blue-green is normal. Colourless suggests little copper. Dark blue, cloudy, fading or browning means discard.

If you miss a dose

Skip it. Doubling only doubles the copper.

GHK-Cu dosage questions

How much bacteriostatic water for a 50 mg vial?

2, 3 and 5 mL are all used. More water stings less, but check that your vial can hold it; many are 3 mL glass.

How many units is 1 mg?

In a 50 mg vial: 4 units with 2 mL, 6 units with 3 mL, 10 units with 5 mL, on a U-100 syringe.

What is the typical injected dose?

Mainstream guides say 1 to 2 mg a day. A smaller school uses 200 to 500 mcg. App users most often log 2 to 3 mg per shot (87 logs), then 1 to 2 mg (71), 3 to 5 mg (43) and over 5 mg (5).

How much copper am I injecting?

About 158 mcg per mg of GHK-Cu, from the molecular weight. One site claims 0.3 mg per mg, which the math does not support.

Do I need to cycle it?

Guides cycle it to cap total copper intake. A receptor-reset reason also circulates and has no support. Pickart's own figure is 100 to 200 mg injected over a course, about 1.1 mg/kg in total. If you miss a dose, skip it; doubling only doubles the copper.

Sources for these doses

19 sources, each checked by date. Record updated Oct 24, 2026. Numbers are restated in our own words and labelled by where they came from.

Vendor guide2

  1. GHK-Cu 50 mg product pageVendor product page · checked Oct 23, 2026
  2. GHK-Cu 100 mg product pageVendor product page · checked Oct 23, 2026

Competitor guide17

  1. GHK-Cu peptidepeptidedosages.com · checked Oct 23, 2026
  2. GHK-Cu 50 mg vial dosage protocolpeptidedosages.com · checked Oct 23, 2026
  3. GHK-Cu dosage chartpeptidedeck.com · checked Oct 23, 2026
  4. GHK-Cu injection dosagepeptidesexplorer.com · checked Oct 23, 2026

Back to the full GHK-Cu page for side effects, storage, stacks and legal status.