How Much Bac Water for 50mg GHK-Cu in Units (and 100mg)
How much bac water for 50mg GHK-Cu is your choice, but 7 of the top 10 US search results we read on 22 October 2026 gave 2 mL as their main answer. That makes 25 mg per mL, so 1 mg is 4 units on a U-100 insulin syringe. A 100 mg vial is twice as strong at the same volume, so it needs more water for the same reading.
Short answer
- 50 mg vial, 2 mL: 25 mg per mL. 1 mg is 4 units.
- 100 mg vial, 3 mL: 33.33 mg per mL. 1 mg is 3 units.
- 100 mg vial, 5 mL: 20 mg per mL. 1 mg is 5 units.
Disclaimer: the amounts here only show how the unit math works. They come from a community site, not a trial, and they are not advice for you; a licensed clinician should make any dose choice.
The most any of the 4 we read in full showed was four vial and water pairs. This page shows both vial sizes at every volume from 1 to 5 mL, and marks each draw that is too small to measure well.
Sources: Google US first page for the 50mg GHK-Cu question, checked on 22 October 2026: freebooks4doctors.com, peptidedosingprotocols.com, thepeptidecatalog.com and an Alpa Bio Med sheet (read in full), plus tcurgentcare.com, perfectb.com and justanswer.com (search snippets) give 2 mL as their main answer for 50 mg; Community dosing site Peptide Dosing Protocols, its GHK-Cu page; Humulin R U-100 drug label on openFDA, 100 units in each mL
What amounts of GHK-Cu do dosing guides use?
No trial has set a GHK-Cu injection dose. The figures people work from come from community sites. Here is one we read, so the tables below have real amounts to convert.
Peptide Dosing Protocols, a community dosing site, lists these injected amounts:
1 mg, 5 days a week, for 4 weeks
1 to 1.5 mg once a day, for 4 to 6 weeks
1.5 to 2 mg once a day, for 6 to 8 weeks
Disclaimer: a community site self-reports these figures. No human trial has tested GHK-Cu on its own as an injection, so no proven dose exists. They are not advice to take any amount; talk to a licensed clinician first.
The same site says no proven human injection plan exists. A PubMed search we ran on 22 October 2026, for human clinical trials naming GHK-Cu or copper peptide with injection terms, found no human trial of GHK-Cu injected on its own. The only injected human studies we found used scalp injections of hair mixes that list copper tripeptide among several ingredients; the rest put it on the skin. One small 2006 trial, for example, used GHK-Cu skin products after laser treatment and found no faster drop in redness.
For what the research does and does not show, see our GHK-Cu research page.
Sources: Community dosing site Peptide Dosing Protocols, its GHK-Cu page; PubMed search, 22 October 2026: GHK-Cu, copper tripeptide or copper peptide, with injection terms, limited to human clinical trials; Scalp injections of a hair mix with copper tripeptide-1, J Cosmet Laser Ther 2018, PMID 29482481; Scalp injections of a hair mix with copper tripeptide, J Clin Aesthet Dermatol 2018, PMID 30057663; Miller and colleagues 2006, copper peptide creams after CO2 laser (PMID 16847171)
How many units is 1 mg of GHK-Cu in a 50mg vial?
It is 4 units with 2 mL of water. That is already just under the 5 unit line where a draw gets hard to read. With 3 mL, 1 mg moves up to 6 units. The table shows every amount from the community list at 1 to 5 mL.
| Amount | 1 mL (50 mg/mL) | 2 mL (25 mg/mL) | 3 mL (16.67 mg/mL) | 4 mL (12.5 mg/mL) | 5 mL (10 mg/mL) | Full draws per vial |
|---|---|---|---|---|---|---|
| 1 mg | 2 (small draw) | 4 (small draw) | 6 | 8 | 10 | 50 |
| 1.5 mg | 3 (small draw) | 6 | 9 | 12 | 15 | 33 |
| 2 mg | 4 (small draw) | 8 | 12 | 16 | 20 | 25 |
"Small draw" means under 5 units. Full draws per vial is 50 mg divided by the amount, rounded down. It does not change with the water. At one draw a day, it is also the number of days a vial covers on paper.
Disclaimer: a community site self-reports these figures. No human trial has tested GHK-Cu on its own as an injection, so no proven dose exists. They are not advice to take any amount; talk to a licensed clinician first.
Sources: Community dosing site Peptide Dosing Protocols, its GHK-Cu page; Humulin R U-100 drug label on openFDA, 100 units in each mL
How much bac water for 100mg GHK-Cu?
A 100 mg vial needs more water than a 50 mg vial for the same reading. With 2 mL it holds 50 mg per mL, and 1 mg is only 2 units. 1 mg does not reach 5 units until you add 5 mL. Of the 3 top results we read in full that cover this vial, one used 2 mL, one used 3 mL and one gave 3 or 5 mL.
| Amount | 1 mL (100 mg/mL) | 2 mL (50 mg/mL) | 3 mL (33.33 mg/mL) | 4 mL (25 mg/mL) | 5 mL (20 mg/mL) | Full draws per vial |
|---|---|---|---|---|---|---|
| 1 mg | 1 (small draw) | 2 (small draw) | 3 (small draw) | 4 (small draw) | 5 | 100 |
| 1.5 mg | 1.5 (small draw) | 3 (small draw) | 4.5 (small draw) | 6 | 7.5 | 66 |
| 2 mg | 2 (small draw) | 4 (small draw) | 6 | 8 | 10 | 50 |
Before you add 4 or 5 mL, check that the vial has room for it. A full vial cannot take more water.
Disclaimer: a community site self-reports these figures. No human trial has tested GHK-Cu on its own as an injection, so no proven dose exists. They are not advice to take any amount; talk to a licensed clinician first.
Sources: Top results read in full that cover a 100 mg vial, 22 October 2026: thepeptidecatalog.com (2 mL), an Alpa Bio Med sheet (3 mL), peptidedosingprotocols.com (3 or 5 mL); Community dosing site Peptide Dosing Protocols, its GHK-Cu page; Humulin R U-100 drug label on openFDA, 100 units in each mL
How do you check GHK-Cu math by hand?
Three steps work for any vial. Here they are for a 100 mg vial mixed with 3 mL, at 1 mg.
- Strength: 100 mg divided by 3 mL is 33.33 mg per mL.
- Volume: 1 mg divided by 33.33 mg per mL is 0.03 mL.
- Units: 0.03 mL times 100 is 3 units.
The 50 mg vial with 2 mL works the same way: 25 mg per mL, then 0.04 mL, then 4 units. If your answer is a thousand times off, check that the vial and the amount are both in mg, not one of them in mcg.
To skip the hand math, the GHK-Cu calculator does it for any vial, water volume and amount.
Disclaimer: the amounts here only show how the unit math works. They come from a community site, not a trial, and they are not advice for you; a licensed clinician should make any dose choice.
Sources: Humulin R U-100 drug label on openFDA, 100 units in each mL
Is more bac water better for GHK-Cu?
For reading the syringe, usually yes. GHK-Cu amounts are small next to the size of the vial, so the draws are tiny. More water makes each draw bigger without changing the milligrams in it.
Tiny draws are where mistakes happen. Researchers in 2004 weighed 1, 2 and 5 unit doses drawn with insulin syringes. The syringes missed badly at 1 unit, and pens and a pump beat them at 2 units. Syringes marked in half units were no better. In the 100 mg table, every amount at 1 or 2 mL lands at 4 units or less.
One top result we read, freebooks4doctors.com, also suggests more water stings less. We found no study that tests this for GHK-Cu.
Pick the syringe to match. A 0.3 mL insulin syringe holds 30 units, a 0.5 mL one holds 50 and a 1 mL one holds 100. To see each mark in mL, use our insulin syringe units chart.
Sources: 2004 Clinical Pediatrics bench test of tiny insulin doses (PMID 14968895); FDA device listings for insulin syringes, 0.3 to 1 mL; Google US first page for the 50mg GHK-Cu question, checked on 22 October 2026: freebooks4doctors.com, peptidedosingprotocols.com, thepeptidecatalog.com and an Alpa Bio Med sheet (read in full), plus tcurgentcare.com, perfectb.com and justanswer.com (search snippets) give 2 mL as their main answer for 50 mg
How do you mix GHK-Cu with bac water?
GHK-Cu has no label of its own. Below, each step is what one named label, for another product or for the water, tells its users.
- Alcohol pad first: Novarel's label has users wipe both vial tops, then keep fingers off them.
- Hospira's bac water label wants germ-free handling on every entry into a vial.
- Serostim's label points the water stream against the vial's glass wall to prevent foaming.
- EGRIFTA WR's label mixes by moving the vial in a circle and rules out shaking; Serostim's does too.
- Serostim's label rejects a cloudy mix or one with particles, and EGRIFTA WR's says its own mix should be colorless. For GHK-Cu, two community guides, Peptide Dosing Protocols and The Peptide Catalog, say a faint blue or blue-green tint is normal because it holds copper.
- On dating: the CDC wants clinics to mark each multi-dose vial with the day it was first opened.
No label gives a water volume for GHK-Cu; the tables above are math only. A blue color does not prove the vial holds what the label says. Because one vial gets drawn from for weeks, the water needs a preservative; plain sterile water has none, as bac water vs sterile water explains. For general injection steps, see how to inject peptides.
Sources: hCG (Novarel) vial preparation text, DailyMed; Hospira bac water package insert on DailyMed, 2019 revision; Somatropin (Serostim) reconstitution text, DailyMed; Tesamorelin (EGRIFTA WR) mixing directions on DailyMed; CDC clinic guidance on safe injections; Community dosing site Peptide Dosing Protocols, its GHK-Cu page; The Peptide Catalog, GHK-Cu reconstitution guide, read 22 October 2026
How long does mixed GHK-Cu keep?
No label tells you, because no GHK-Cu injection is approved. The community site we read gives no firm time either.
- The bac water label keeps the water at 20 to 25 C. Mixed drugs, it says, are not for keeping unless their maker permits it.
- For clinics, the CDC limit on an opened multi-dose vial is 28 days, unless the maker lists another date. It is a general vial rule, not a GHK-Cu rule.
For the water's own storage rules, see does bacteriostatic water need to be refrigerated, and for the basics of the diluent, see what is bac water.
Sources: Hospira bac water package insert on DailyMed, 2019 revision; CDC clinic guidance on safe injections; Community dosing site Peptide Dosing Protocols, its GHK-Cu page
Disclosure: Some links on this page are referral links. Peptides Vietnam may earn a fee at no cost to you. Editorial content is never sold.
You can buy GHK-Cu in Vietnam at Peptara Labs; message them to see what's available. Check whether the vial is 50 mg or 100 mg first, because the water you need depends on it.
They also sell bacteriostatic water, enough for the 2 to 5 mL mixes in the tables above.
Common questions
How much bac water for 50mg GHK-Cu?+
On 22 October 2026, 7 of the top 10 US search results gave 2 mL as their main answer. That makes 25 mg per mL, so 1 mg is 4 units on a U-100 insulin syringe. With 3 mL it is 16.67 mg per mL and 1 mg is 6 units. Add 5 mL and each mL holds 10 mg, so 1 mg reads as 10 units. Disclaimer: the amounts here only show how the unit math works. They come from a community site, not a trial, and they are not advice for you; a licensed clinician should make any dose choice.
How much bac water for 100mg GHK-Cu?+
A 100 mg vial is twice as strong at the same volume. The 3 top results we read that cover it used between 2 and 5 mL. With 2 mL, 1 mg is only 2 units. With 3 mL it is 3 units, and with 5 mL it is 5 units. Disclaimer: the amounts here only show how the unit math works. They come from a community site, not a trial, and they are not advice for you; a licensed clinician should make any dose choice.
How many units is 2 mg of GHK-Cu?+
It depends on the vial and the water. In a 50 mg vial with 2 mL, 2 mg is 8 units. In a 100 mg vial with 2 mL it is 4 units, and with 5 mL it is 10 units. Disclaimer: the amounts here only show how the unit math works. They come from a community site, not a trial, and they are not advice for you; a licensed clinician should make any dose choice.
Why is mixed GHK-Cu blue?+
GHK-Cu holds copper, and two guides we read, Peptide Dosing Protocols and The Peptide Catalog, say a faint blue or blue-green tint in the mixed liquid is expected. The color does not prove the strength or purity of what is in the vial. A cloudy liquid, specks or an odd color is a reason to stop, because the bac water label says a mixed drug should be clear.
Is there a proven GHK-Cu injection dose?+
No. A PubMed search we ran on 22 October 2026 found no human trial of GHK-Cu injected on its own. The only injected human studies we found used scalp injections of hair mixes that list copper tripeptide among several ingredients; the rest put it on the skin. The amounts people inject come from community sites, not from trials.
Does more bac water make GHK-Cu weaker?+
No. A 50 mg vial still holds 50 mg whether you add 1 mL or 5 mL. More water only spreads each milligram across more units, which makes small amounts easier to read on the syringe.
Sources: Google US first page for the 50mg GHK-Cu question, checked on 22 October 2026: freebooks4doctors.com, peptidedosingprotocols.com, thepeptidecatalog.com and an Alpa Bio Med sheet (read in full), plus tcurgentcare.com, perfectb.com and justanswer.com (search snippets) give 2 mL as their main answer for 50 mg; Top results read in full that cover a 100 mg vial, 22 October 2026: thepeptidecatalog.com (2 mL), an Alpa Bio Med sheet (3 mL), peptidedosingprotocols.com (3 or 5 mL); Community dosing site Peptide Dosing Protocols, its GHK-Cu page; The Peptide Catalog, GHK-Cu reconstitution guide, read 22 October 2026; PubMed search, 22 October 2026: GHK-Cu, copper tripeptide or copper peptide, with injection terms, limited to human clinical trials; Scalp injections of a hair mix with copper tripeptide-1, J Cosmet Laser Ther 2018, PMID 29482481; Hospira bac water package insert on DailyMed, 2019 revision; Humulin R U-100 drug label on openFDA, 100 units in each mL
Related reading
GHK-Cu Calculator
Any vial, water volume and amount
GHK-Cu Research
What the studies tested and found
Topical GHK-Cu
The skin products most human studies used
AHK-Cu vs GHK-Cu
How the two copper peptides differ
Syringe Units to mL Chart
Read any mark on a U-100 barrel
What Is Bac Water?
The diluent explained, one label line at a time
Treat this page as background, not medical advice. It turns amounts from one community site into syringe units and suggests no dose. No GHK-Cu injection is approved anywhere we looked.