TB-500 dosage chart: how many units on the syringe

Units measure volume, not peptide

An insulin syringe is marked in units because it was designed for insulin, where the concentration is fixed and printed on the bottle. Peptide vials have no fixed concentration. You create it when you add water.

So a unit mark tells you volume only. On a U-100 barrel, the 100 mark is one full milliliter, and every unit below it is a hundredth of that. The syringe does not know what is in it.

That means the number of units for a given milligram dose depends on two variables: how many milligrams are in the vial, and how much bacteriostatic water was added. Change either and the unit count changes, even though the dose in milligrams has not moved.

What the chart shows

The table on this page is computed for a 5 mg TB-500 vial across the three water volumes commonly used, at the dose amounts that appear in listings.

The first thing to notice is that more water means more units for the same dose. A 1 mg dose is 20 units at 5 mg/mL, 40 units at 2.5 mg/mL, and 60 units at 1.67 mg/mL. Nothing about the dose changed. The peptide was spread through more liquid, so more liquid has to be drawn to capture the same amount.

The second is that several rows are flagged as over one barrel. A U-100 syringe stops at 100 units. Any row above that, such as 2 mg in 3 mL at 120 units or 5 mg in 2 mL at 200 units, cannot be drawn in a single fill. A more concentrated solution, made with less water, produces a smaller unit count for the same milligram figure.

The third is that the same unit number can mean different doses. 100 units is a 5 mg dose at 5 mg/mL and a 2.5 mg dose at 2.5 mg/mL. A unit count written down without the vial size and water volume beside it is meaningless. All three belong together on the label.

Other vial sizes

TB-500 is sold in 2 mg, 5 mg and 10 mg vials. The chart here is calculated for the 5 mg vial only.

The direction of the effect is straightforward. The same volume of water in a vial holding more peptide gives a stronger solution, so a given milligram dose occupies fewer units. The same water in a vial holding less peptide gives a weaker solution, so the dose occupies more units and is more likely to run past the end of the barrel.

A unit count does not carry across from one vial size to another. The arithmetic has to be redone for the vial actually in hand, or read off a chart built for that size.

What is not known about TB-500

TB-500 is not approved by any regulator for human use. We hold no reliable human pharmacokinetic data for it.

That means this site makes no claim about its half life, how long it takes to clear, or whether it builds up with repeated administration. Anything published elsewhere that assigns it a clearance figure is not something we can verify, and we will not repeat it.

Everything on this page is arithmetic. Milligrams in a vial, milliliters of water, resulting concentration, resulting volume on a syringe. That arithmetic holds regardless of what the compound does in a body, because it is a property of the solution and not of the biology.

Questions this page does not answer

This page has no medical review. It does not cover what dose to take, how often, or for how long. The doses in the chart are the ones that appear in product listings, which is a statement about what is sold and nothing more.

It also says nothing about what to expect, what side effects occur, whether TB-500 is safe, or whether it has any effect at all. Those are clinical questions. A conversion table cannot answer them and this one does not try.

What the page does is narrow. Given a dose in milligrams, a vial size and a water volume, it reports how far up the barrel that lands. Every question that sits upstream of those inputs belongs with a clinician.

What we do not know

We hold no reliable human pharmacokinetic data for TB-500, so this site makes no claims about its half life, how long it takes to clear, or how it accumulates. The arithmetic below concerns concentration and volume only.

This page answers arithmetic and handling questions. It does not tell you what dose to take, what to expect, or whether anything is appropriate for you, and there is no medical review behind it.

Common questions

How many units is 2 mg of TB-500?

It depends on the concentration. From a 5 mg vial in 1 mL, 2 mg is 40 units on a U-100 syringe. From the same vial in 2 mL it is 80 units, and in 3 mL it is 120 units, which is more than one barrel holds. The milligram figure alone is not enough to produce an answer.

What happens if my dose is more than 100 units?

A U-100 syringe holds 100 units, so anything above that cannot be drawn in one fill. The chart flags these rows, such as 2.5 mg in 3 mL at 150 units. Less water gives a more concentrated solution, which brings the unit count for the same milligram dose back down.

Does adding more water reduce the dose?

No. The vial still contains the same number of milligrams. More water spreads that peptide through more liquid, so each unit carries less of it, and more units are needed for the same dose. Water volume changes the unit count, not the milligrams.

How long does TB-500 stay in the body?

We do not know, and this site will not guess. There is no reliable human pharmacokinetic data for TB-500, so we make no claim about its half life, clearance or accumulation. The chart on this page covers concentration and volume only.

Can I use this chart for a 10 mg vial?

No. This table is calculated for a 5 mg vial. A 10 mg vial reconstituted with the same water volume is more concentrated, so the unit count for a given dose is different. A chart built for that vial size is the one to read.

Which water volume goes with which dose?

The chart shows what each of the three volumes does to the unit count, including which combinations run past the end of a U-100 barrel. That is the extent of what this page can tell you. It does not select a volume, a dose or a compound on your behalf.