PepSync

KLOW peptide dosage calculator

Mix an 80 mg KLOW vial with 4 mL of bacteriostatic water to get 20 mg/mL of total blend. A 2 mg draw is then 0.1 mL, or 10 units on a U-100 syringe, and delivers about 1.25 mg GHK-Cu plus 250 mcg each of BPC-157, TB-500 and KPV.

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  • Formula shown below
  • U-100 syringe units

KLOW dose calculator

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On the vial label
mg
Amount you add
mL
What you plan to take
Syringe sizeU-100 insulin syringe
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Built with research from
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  • University of Oxford
  • Harvard Medical School

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How your KLOW draw is calculated

  1. 1Find the concentration

    80 mg × 1,000 ÷ 4 mL
    = 20,000 mcg/mL

  2. 2Work out the volume

    2,000 mcg ÷ 20,000 mcg/mL
    = 0.10 mL

  3. 3Convert to units

    0.10 mL × 100
    = 10 units

On a U-100 insulin syringe, 100 units equals 1 mL, so each unit is 0.01 mL. The 0.3 mL (30 unit) and 0.5 mL (50 unit) syringes use the same scale, just shorter, which makes small doses easier to read.

Use this KLOW calculator to turn a KLOW blend vial, your bacteriostatic water volume, and a dose into the exact mL and units to draw — and to see how much GHK-Cu, BPC-157, TB-500 and KPV each draw delivers. This page covers the math only; KLOW is a research blend, not an approved medicine.

Common vial
80 mg blend
Typical label
50 + 10 + 10 + 10 mg
Common syringe
U-100 insulin
Last reviewed
Educational reference only. Not medical advice — follow the instructions from your clinician or pharmacy.

Quick math example

An 80 mg KLOW vial mixed with 4 mL gives 20 mg/mL. A 2 mg total dose is 0.1 mL, which equals 10 units on a U-100 syringe.

What is in a KLOW vial

KLOW is a four-peptide blend sold in a single vial. It is most commonly labelled as 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 and 10 mg KPV, for 80 mg in total. Labels do vary between suppliers, so check the amounts printed on your own vial before you calculate.

Because the four peptides are mixed in one vial, every draw contains all four in the same ratio. With the common 50/10/10/10 label, GHK-Cu is 62.5% of each draw and BPC-157, TB-500 and KPV are 12.5% each.

  • GHK-Cu 50 mg (62.5%) · BPC-157 10 mg (12.5%) · TB-500 10 mg (12.5%) · KPV 10 mg (12.5%)
  • Total = 80 mg — enter this as the vial amount
  • The ratio is fixed: you cannot draw more of one peptide than the others

How the KLOW calculation works

Enter the vial's total milligrams (80 mg for the common label), your water volume, and the total amount of blend you want per dose. The calculator returns concentration, mL and syringe units exactly as it would for a single peptide.

To see what one draw contains, multiply the total dose by each peptide's share. A 2 mg draw from a 50/10/10/10 vial is 1.25 mg GHK-Cu (2 × 0.625) and 0.25 mg — 250 mcg — each of BPC-157, TB-500 and KPV (2 × 0.125).

  • 80 mg / 4 mL = 20 mg/mL of total blend
  • 2 mg total / 20 mg per mL = 0.1 mL = 10 units
  • Per draw: 1.25 mg GHK-Cu + 250 mcg BPC-157 + 250 mcg TB-500 + 250 mcg KPV

How much BAC water for an 80 mg KLOW vial

4 mL gives 20 mg/mL, so every 10 units on a U-100 syringe is 2 mg of blend (1.25 mg GHK-Cu and 250 mcg of each other peptide) and 20 units is 4 mg. 3 mL gives about 26.7 mg/mL, where 10 units is about 2.67 mg of blend. 2 mL gives 40 mg/mL, where 10 units is 4 mg.

More water makes small doses easier to read but needs a vial that can hold it — check the fill capacity before adding 4 mL. An 80 mg vial holds forty 2 mg doses, which is longer than many reconstituted beyond-use windows, so plan around that date too.

  • 80 mg / 4 mL = 20 mg/mL → 10 units = 2 mg blend, 20 units = 4 mg
  • 80 mg / 3 mL = 26.7 mg/mL → 10 units ≈ 2.67 mg blend
  • 80 mg / 2 mL = 40 mg/mL → 10 units = 4 mg blend

Dosing KLOW by one peptide

Protocols are often written around one component — for example "250 mcg of BPC-157". To turn that into a total KLOW dose, divide by that peptide's share: 250 mcg ÷ 0.125 = 2 mg of blend. Enter 2 mg as the dose and the calculator gives the draw; the GHK-Cu, TB-500 and KPV come along in the fixed ratio.

If you need the peptides in a different ratio, a blend is the wrong tool — use separate vials and calculate each on its own page.

  • Total dose = component dose ÷ component share
  • 250 mcg BPC-157 ÷ 0.125 = 2 mg of KLOW
  • Different ratios need separate single-peptide vials

KLOW vs GLOW

GLOW is the same blend without KPV: usually 50 mg GHK-Cu, 10 mg BPC-157 and 10 mg TB-500, for 70 mg in total. The shares change (GHK-Cu about 71%, BPC-157 and TB-500 about 14% each), so a draw sized for one blend delivers different amounts from the other. Use the calculator for the blend on your label.

Frequently asked questions

What is KLOW peptide?
KLOW is a pre-mixed blend of four peptides in one vial — most commonly 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 and 10 mg KPV (80 mg total). It is sold as a research product and is not an approved medicine. Always check the amounts on your own label.
How much BAC water should I add to KLOW?
For an 80 mg vial, 4 mL gives 20 mg/mL (10 units = 2 mg of blend), 3 mL gives about 26.7 mg/mL, and 2 mL gives 40 mg/mL. Pick the volume your protocol specifies, or one that keeps your dose on readable unit marks, and check the vial can hold it.
How much BPC-157 is in a KLOW dose?
On the common 50/10/10/10 label, BPC-157 is 12.5% of the blend, so a 2 mg draw contains 250 mcg of BPC-157 (and 250 mcg each of TB-500 and KPV, plus 1.25 mg GHK-Cu). At 20 mg/mL that 2 mg draw is 10 units.
Can I change the ratio of peptides in a KLOW vial?
No. Every draw from a blended vial contains the peptides in the labelled ratio. If you need different amounts of each, use separate single-peptide vials and calculate each one on its own page.
Does this calculator recommend a KLOW dose?
No. It converts a dose you already have into mL, syringe units and per-peptide amounts. KLOW is not an approved medicine, and dosing decisions sit with you and a clinician.

Primary sources

Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.

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