GLOW Peptide Calculator

Why a blend needs different maths

A single-peptide vial has one question: how many units for my dose. A blend has a harder one, because you cannot choose independently.

GLOW arrives as GHK-Cu 50 mg, BPC-157 10 mg, TB-500 10 mg, 70 mg of powder in one vial. Add water and every peptide dissolves into the same solution at the same time. From then on, every draw contains all of them in that fixed proportion. Set your target at 300 mcg of BPC-157 and you have simultaneously decided your GHK-Cu dose, whether you meant to or not.

That is what the calculator above makes visible. Pick one compound, and it shows what the others land on.

The ratio on the vial is a vendor decision

Worth being blunt about: 70 mg split GHK-Cu 50 mg, BPC-157 10 mg, TB-500 10 mg is a formulation someone chose to sell. It is not a dose anyone established in a trial, and it varies between suppliers.

So two things follow. Check what is actually printed on your vial rather than assuming the common ratio, and treat any "GLOW dosing chart" you find, including the numbers this page returns, as arithmetic applied to your inputs rather than a recommendation.

What a GLOW draw actually delivers

At the common 70 mg ratio in 3 mL of BAC water, the solution is about 23.3 mg/mL overall. GHK-Cu makes up 50 of the 70 mg, so it dominates every draw: roughly five times whatever you get of BPC-157 or TB-500 individually.

That is the practical consequence of the ratio. Whichever peptide you dose to, GHK-Cu comes along at five times the amount of BPC-157 or TB-500. Run your own vial through the calculator and the breakdown is explicit.

For how much people take, how often, and a units chart for the common 3 mL mix, see the GLOW peptide dosage guide.

Dose to the GHK-Cu, the way most people do

Most people dose GLOW by its GHK-Cu, the biggest part of the vial, typically around 2 mg. With the common 70 mg vial mixed with 3 mL of BAC water, 2 mg of GHK-Cu is 12 units, and that draw carries 400 mcg each of BPC-157 and TB-500 with it. That is why the calculator opens on GHK-Cu at 2 mg and 3 mL.

You can dose to another peptide instead: pick it as the target and the ratio sets the rest. 400 mcg of BPC-157 is the same 12 units. Whatever you target, enter the dose in mg and check the units are large enough to read before you commit. A small GHK-Cu target such as 250 mcg is 1.5 units on a 3 mL mix.

What the evidence actually supports

The components are not equally studied, and none of them is approved.

• BPC-157. Animal-heavy. A 2025 review of 544 papers found a single human clinical study. No completed human efficacy trial.
• TB-500. The injected fragment has no human efficacy trial. The human data people cite is for full-length recombinant thymosin beta-4, which is a different molecule.
• GHK-Cu. Real human data exists for topical use as a cosmetic ingredient. Injectable GHK-Cu does not have it.

The FDA removed these from its Category 2 bulk-substances list in April 2026. That is frequently reported as a green light. It was not: the nominations were withdrawn by the nominators, which is not a safety clearance, and every component remains an unapproved new drug.

If you are drug-tested, treat the vial as disqualifying. WADA prohibits BPC-157 and TB-500 at all times, and the S0 catch-all covers substances without human therapeutic approval regardless of what a blend is called.

Mixing and storage

Aim the water at the glass wall rather than straight onto the powder, and let it run down the side. Swirl gently until clear. Do not shake, which foams the solution and can damage the peptides.

Store reconstituted in the fridge at 2 to 8 degrees C, upright, out of the light, never frozen. Discard if it goes cloudy or discoloured.

Tracking a blend properly

The awkward thing about a blend is that your log says "GLOW" while your body received three different compounds. That makes a careful record more useful, not less: the dose, the date, the site and how your skin or recovery changed are what let you judge whether the vial is doing anything.