BPC-157 Dosage Calculator: Units, Reconstitution and the TB-500 Blend

BPC-157 is priced and labelled in milligrams and dosed in micrograms, which is a thousandfold gap sitting in the middle of every calculation. That is the error worth designing against, and it is why this calculator takes the dose in micrograms and the vial in milligrams rather than making you convert first.

The arithmetic is two steps. Concentration is vial milligrams divided by millilitres of bacteriostatic water. Volume per dose is the dose, converted to milligrams, divided by that concentration. Syringe units are that volume times the units per millilitre printed on your barrel, which is 100 on a standard U-100 insulin syringe and 40 on a U-40.

The Blend Calculator

BPC-157 and TB-500 are frequently sold pre-mixed in one vial, and that is where the arithmetic becomes genuinely awkward. The two compounds have completely different dosing conventions: BPC-157 runs daily in micrograms, TB-500 runs weekly in milligrams. Putting them in one vial fixes the ratio permanently, so choosing a BPC-157 dose also chooses a TB-500 dose whether you meant to or not.

This is the part most blend buyers do not think through until the vial is already mixed. A 5mg plus 5mg blend in 3mL, dosed at 250 mcg of BPC-157 once daily, delivers 1.75mg of TB-500 across a week. That is at the low end of the usual TB-500 range. Push the BPC-157 to 500 mcg twice daily and the TB-500 lands at 7mg a week, which is at the high end. Both are defensible. Neither was chosen deliberately, which is the problem.

Buying the two compounds separately costs slightly more and removes the constraint entirely. That is the trade, and for a first run it is usually worth paying. Both are sold as single compound vials by the tracked suppliers, including Apollo BPC157 and Apollo TB500. The comparison page covers what each compound contributes.

Choosing the Bacteriostatic Water Volume

The volume of water changes nothing about how much peptide you receive. It changes where the dose lands on the syringe barrel, which is a measurement accuracy question, and that is the only thing it decides.

A useful target is to land a typical dose above ten units. Below about five units, insulin syringe graduations are too fine for most people to read consistently, and a one unit misread becomes a twenty percent dosing error. The table shows how the same 250 microgram dose moves across common setups.

The constraint at the other end is the vial itself, which will not usually hold more than around 5mL, and the fact that reconstituted peptide has a usable life measured in weeks. Mixing a 10mg vial into 5mL for a forty day run is fine. Mixing a 50mg vial for a six month run is not, because the solution will not survive it. The storage guide covers the stability side.

What the Calculator Cannot Tell You

Three things, and all of them matter more than the arithmetic does.

Whether the vial contains what the label says

Every calculation here starts from the number printed on the vial. If the vial is short, so is every dose, and nothing in the maths would reveal it. Lyophilised powder is also not pure peptide by mass: net peptide content for research grade material typically runs 70 to 90 percent, with the remainder being residual water and counterions from synthesis. Real delivered doses therefore sit modestly below the calculated figure even when the vendor has done nothing wrong. The testing guide covers how to find out where a specific vial sits.

Whether the dose is the right dose

No human dose finding trial has been run for BPC-157. The commonly used 250 to 500 microgram range comes from reported experience, and the allometric conversion from the underlying rodent studies actually points somewhere closer to 110 micrograms for a 70kg adult. The calculator will happily convert any number you give it. Which number to give it is covered in the dosage page, which traces each figure back to its source.

Whether the compound suits the injury

BPC-157 and TB-500 are not interchangeable and neither is right for everything. The tendon repair page and the joint pain page cover where each one has a reasonable case, and the stack builder works through compound selection before you get anywhere near a syringe.

Reconstitution, Briefly

The calculator assumes the vial is mixed correctly. Four points cover most of it. Aim the bacteriostatic water at the glass wall rather than firing it into the powder cake, because shear denatures peptide. Swirl gently and wait rather than shaking. Write the concentration and the date on the vial before it goes into the refrigerator, because two vials at different concentrations look identical four weeks later. And use bacteriostatic rather than sterile water for any vial you will draw from more than once, because the benzyl alcohol is what makes repeated needle entry reasonable.

The reconstitution guide covers the full sequence, and the injection guide covers site rotation, which matters over a six week block more than most people expect. If you are buying consumables at the same time, 10mL of reconstitution solution covers several vials at this scale.

Key Takeaways

• BPC-157 is labelled in milligrams and dosed in micrograms, a thousandfold gap that is the most consequential error available here
• Concentration is vial mg divided by mL of water, and everything else follows from it
• Water volume decides only how the dose reads on the barrel, not how much compound you get
• Aim for a typical dose above ten units, because five units is unforgiving to a misread
• A pre-mixed BPC-157 and TB-500 vial fixes the ratio permanently, so the BPC dose silently chooses the TB dose
• Separate vials cost slightly more and keep both doses adjustable
• Check whether the barrel is U-100 or U-40 before drawing, because the same volume reads 2.5 times differently

Frequently Asked Questions

How do I convert BPC-157 micrograms to syringe units?

Divide the vial strength in milligrams by the millilitres of bacteriostatic water to get concentration in mg per mL, then multiply by 1,000 to work in micrograms per mL. Divide your target dose in micrograms by that figure to get the volume in millilitres, then multiply by 100 for a U-100 insulin syringe. A 10mg vial in 5mL is 2,000 mcg per mL, so a 250 mcg dose is 0.125mL, which is 12.5 units.

How much bacteriostatic water for a 5mg BPC-157 vial?

Two millilitres is a common and sensible choice. That gives 2,500 micrograms per millilitre, at which a 250 mcg dose reads as 10 units on a U-100 syringe, which is comfortably readable. One millilitre puts the same dose at 5 units, which is measurable but unforgiving. There is no correct answer, because the water volume changes only how the dose sits on the barrel and nothing about how much peptide you receive.

How do I dose a BPC-157 and TB-500 blend?

You choose one and accept the other. A blended vial fixes the ratio between the two compounds permanently, so setting a BPC-157 dose also sets the TB-500 dose that comes with it. Work out the BPC-157 volume first, then check what weekly TB-500 total that produces at your injection frequency. A 5mg plus 5mg blend in 3mL at 250 mcg BPC-157 once daily delivers about 1.75mg of TB-500 a week.

Is a blend better than separate vials?

It is cheaper and more convenient, and it costs you control. With separate vials you can run BPC-157 daily and TB-500 weekly at doses chosen independently, which is how both compounds are normally dosed. With a blend, changing one changes the other in fixed proportion. For a first run, separate vials are worth the small premium; once a ratio is known to work, a blend is a reasonable convenience.

How long will a 10mg BPC-157 vial last?

At 250 micrograms once daily, forty days. At 250 micrograms twice daily, twenty. At 500 micrograms twice daily, ten. A 10mg vial holds 10,000 micrograms, so dividing that by the total daily dose gives the number of days directly. Whether the solution stays good for that long is a separate question: reconstituted peptide has a usable life measured in weeks at refrigerator temperature.

Does the calculator work for TB-500 on its own?

Yes, with one change. TB-500 is dosed in milligrams rather than micrograms, so enter the dose as micrograms by multiplying by a thousand. A 2mg TB-500 dose is 2,000 micrograms. Everything else in the calculation is identical, because the arithmetic does not care which peptide is in the vial.