What this does
The stocked vial is 80 mg: 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 and 10 mg KPV. In 4 mL that is 20 mg/mL of total peptide, of which 12.5 mg/mL is GHK-Cu and 2.5 mg/mL is each of the other three. The ratio is fixed at manufacture and no draw volume changes it.
The vial size above is the one Peptriva ships, read from the live listing. Change it if yours differs. The dose stays whatever you set — this tool does not suggest one.
What is in an 80 mg KLOW vial?
The stocked vial is 80 mg co-lyophilized at the market-standard split: 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 and 10 mg KPV. That is a 5:1:1:1 ratio, and it is GLOW plus KPV.
The 80 mg total at four water volumes:
| Water added | Concentration | Units for a 1 mg draw |
|---|---|---|
| 1 mL | 80 mg/mL | 1.2 units |
| 2 mL | 40 mg/mL | 2.5 units |
| 3 mL | 26.6667 mg/mL | 3.8 units |
| 5 mL | 16 mg/mL | 6.2 units |
Those are TOTAL concentrations. Multiply by 0.625 for GHK-Cu and by 0.125 for each of the other three. At 4 mL: 12.5 mg/mL GHK-Cu, 2.5 mg/mL each of BPC-157, TB-500 and KPV.
There is no KLOW dose to convert
No published study has given these four compounds together, in any species. Two of the four — TB-500 and KPV — have no published human dose at all, so there is nothing to reconstruct a blend figure from.
The KLOW dosage page works through what each constituent was administered at separately, and why a fixed 5:1:1:1 cake cannot be titrated to any one of them.
What the tool does is exact and worth having: it tells you what a given volume actually contains. On a four-compound vial that is genuinely hard to do in your head, and getting it wrong is how people end up unaware of the next section.
The trap on this one: the copper ceiling
GHK-Cu is 62.5% of the vial by mass and it is a copper complex. Copper is roughly 15.8% of that complex by weight, so the 50 mg of GHK-Cu carries about 7.9 mg of elemental copper.
The tolerable upper intake level for copper in adults is 10 mg per day from all sources, against a recommended intake of 0.9 mg. One vial therefore holds close to a full day’s ceiling of copper. Those reference values were set for oral intake, where the gut regulates absorption; an injected route does not.
That is why the volume you draw is a copper question before it is a peptide question, and why the blue color should be read literally rather than as a quality signal. KLOW side effects covers the rest, and the KLOW guide covers what is in the vial.
Frequently asked questions
How much water for an 80 mg KLOW vial?
Your choice. 4 mL gives 20 mg/mL of total peptide, which is 12.5 mg/mL GHK-Cu and 2.5 mg/mL each of BPC-157, TB-500 and KPV. The vial holds the same 80 mg regardless.
What is the concentration of each compound in KLOW?
It follows the 5:1:1:1 split. Multiply the total concentration by 0.625 for GHK-Cu and by 0.125 for each of the other three. At 80 mg in 4 mL that is 12.5 mg/mL and 2.5 mg/mL respectively.
What is the correct KLOW dose?
There isn't one. No study has administered the four compounds together in any species, and two of them have no published human dose at all. This tool converts what you enter rather than proposing a figure.
How much copper is in a KLOW draw?
About 15.8% of the GHK-Cu content by weight. The full 50 mg of GHK-Cu carries roughly 7.9 mg of elemental copper, against a 10 mg per day adult upper intake level that was set for oral intake with gut regulation in play.
References
- American Society of Health-System Pharmacists (ASHP). Handbook on Injectable Drugs: Benzyl alcohol preservative compatibility and stability data. https://www.ashp.org/products-and-services/database-tools/handbook-on-injectable-drugs
- United States Pharmacopeia. (2024). Bacteriostatic Water for Injection — monograph and in-use stability guidance. USP-NF. (See institutional access.) https://doi.org/10.4135/9781412963855.n1200
- Wang, W. (1999). Instability, stabilization, and formulation of liquid protein pharmaceuticals. International Journal of Pharmaceutics, 185(2), 129–188. https://doi.org/10.1016/s0378-5173(99)00152-0
The arithmetic needs no citation; the diluent and stability guidance does.