Enter the BPC-157 milligrams in your blend, the bacteriostatic water you added and the BPC-157 amount you want per draw. You get the syringe mark, and the TB-500 comes with it.
Quick answer: most “10 mg” blends are 5 mg BPC-157 plus 5 mg TB-500. Mixed with 2 ml of bac water, each peptide is 2.5 mg/ml, so 10 units on a U-100 syringe holds 250 mcg of BPC-157 and 250 mcg of TB-500. Enter 5 mg below, not 10: the calculator needs one peptide's milligrams, never the blend total.
100 units per ml. Check the barrel — this is what almost every insulin syringe is.
U-100 insulin syringe · 50 unit barrel
Keep a log of every dose and vial on your phone — Dose Tool for Android
Blend vials are often sold by their total, “BPC-157 / TB-500 10 mg”, while the dosing conversation is about each peptide separately. That gap causes the most common blend error: treating 10 mg as the BPC-157 content. If you enter 10 mg when the vial really holds 5 mg of BPC-157, every unit count comes out half of what it should be, and each draw delivers half the BPC-157 you meant to draw.
So before any arithmetic, find the split. Most blends are equal halves (5 mg + 5 mg in a 10 mg vial, 10 mg + 10 mg in a 20 mg vial), but some sellers fill unequal amounts. The split is fixed when the vial is filled; adding water cannot change it.
Instead of asking how many units a dose is, this table turns it around: for a few common marks on a U-100 syringe, how much of each peptide the draw contains. The marks are examples to show the arithmetic, not a suggestion of what to use.
| Blend + water | Each conc. | 5 units | 10 units | 20 units | 30 units |
|---|---|---|---|---|---|
| 10 mg (5+5), 2 ml | 2.5 mg/ml | 125 mcg each | 250 mcg each | 500 mcg each | 750 mcg each |
| 10 mg (5+5), 3 ml | 1.67 mg/ml | 83 mcg each | 167 mcg each | 333 mcg each | 500 mcg each |
| 20 mg (10+10), 2 ml | 5 mg/ml | 250 mcg each | 500 mcg each | 1000 mcg each | 1500 mcg each |
| 20 mg (10+10), 3 ml | 3.33 mg/ml | 167 mcg each | 333 mcg each | 667 mcg each | 1000 mcg each |
Compare the two 2 ml rows: the 20 mg blend packs twice as much of each peptide into every unit as the 10 mg blend. The same 10 unit mark is 250 mcg of each from one vial and 500 mcg of each from the other. That is why a unit count only means something next to the vial it came from.
Figures are rounded to the nearest microgram. The 3 ml rows produce non-round concentrations, which is fine for drawing but annoying to do in your head; let the calculator handle those.
Once both peptides are dissolved in the same water, every drop contains both in the vial's ratio. Drawing more to get more BPC-157 also draws more TB-500, one for one in an equal blend. Anyone who wants the two amounts to differ needs separate vials, each mixed and calculated on its own.
BPC-157 is a short synthetic peptide studied for tissue repair in animals. TB-500 is a synthetic peptide based on part of thymosin beta-4. They are different molecules that happen to be sold together; the blend is a packaging choice, not a combined drug.
Reconstitute a blend like any other vial: let the bacteriostatic water run down the inside wall, then swirl gently until clear. Then label it with both peptides, both concentrations and the date, for example “BPC 2.5 / TB 2.5 mg/ml, mixed 16 Oct”. A blend loses more information than a single vial when the label is missing, because the ratio disappears too.
Keep the reconstituted vial in the fridge and follow the documentation that came with it for how long it lasts. The water has its own limit: how long bac water lasts. For a single-page reference to print, the peptide cheat sheet has the conversion tables.
Only BPC-157 in the vial? Use the BPC-157 dosage calculator. For another two-peptide blend, see the CJC-1295 + ipamorelin calculator, or start from the general peptide reconstitution calculator.