TB-500 calculator
TB-500 is the research name for thymosin beta-4 or its active fragment. Full-length thymosin beta-4 has been through phase 1 and 2 human trials, by IV and as a topical gel, and was tolerated at IV doses up to 1,260 mg a day for 14 days.
- Frequency
- twice weekly while loading, then once weekly
- Timing
- any time; many pair it with the same days as BPC-157
- Cycle
- 4 to 6 weeks loading, 4 to 8 weeks maintenance, about 8 to 12 weeks total, then a break
- Route
- subcutaneous, abdomen or near the injury; intramuscular is also reported
- Easy mix
- 10 mg + 2 mL = 5 mg/mL, so 2.5 mg = 0.5 mL = 50 units; 2 mg = 40 units, 1 mg = 20 units. A 5 mg vial with 1 mL gives the same 5 mg/mL.
TB-500 units chart
10 mg vial. Rows are doses; columns show the units to draw on a U-100 syringe at each water volume.
| Dose | mL | U-100 units | Doses per vial |
|---|---|---|---|
| 100 mcg | 0.02 | 2 | 100 |
| 200 mcg | 0.04 | 4 | 50 |
| 250 mcg | 0.05 | 5 | 40 |
| 500 mcg | 0.1 | 10 | 20 |
| 1 mg | 0.2 | 20 | 10 |
| 2 mg | 0.4 | 40 | 5 |
| 2.5 mg | 0.5 | 50 | 4 |
| 5 mg | 1 | 100 | 2 |
| 10 mg | 2 | 200 | 1 |
Other mixes: 10 mg + 1 mL · 10 mg + 3 mL · 5 mg + 2 mL
About the TB-500 math
TB-500 is a synthetic peptide that matches a segment of thymosin beta-4, a 43-amino-acid protein. Suppliers list it as a lyophilized powder in 5 mg and 10 mg vials. The examples below stay in whole milligrams, which keeps the arithmetic short. A 5 mg vial with 1 mL of bacteriostatic water is 5 mg/mL. A 2 mg draw is 2 divided by 5, which is 0.4 mL, or 40 units on a U-100 syringe. The vial holds two such draws with 1 mg left over, because 5 divided by 2 is 2.5. A 10 mg vial with 2 mL is also 5 mg/mL, so 2 mg is again 40 units, and the vial holds five draws. With only 1 mL in the 10 mg vial the concentration doubles to 10 mg/mL and 2 mg shrinks to 0.2 mL, or 20 units. Pick the volume by the barrel you have: a 0.5 mL syringe tops out at 50 units, so a 40 unit draw fits while an 80 unit draw does not.
TB-500 questions
How much TB-500 should I take?
There is no established human dose. The commonly reported pattern is a loading phase of 2 to 2.5 mg twice a week for 4 to 6 weeks, then 1 to 2 mg once a week. On a 10 mg vial in 2 mL, 2.5 mg is 50 units.
How many units is 2.5 mg of TB-500?
With 10 mg in 2 mL (5 mg/mL), 2.5 mg is 0.5 mL, which is 50 units on a U-100 syringe. With 5 mg in 2 mL it would be 100 units, a full syringe. Larger doses are why many people reconstitute TB-500 more concentrated than BPC-157.
How many units is 2 mg of TB-500 at 10 mg in 2 mL?
10 mg divided by 2 mL is 5 mg/mL. 2 mg divided by 5 mg/mL is 0.4 mL. Multiply by 100 for a U-100 syringe: 40 units, and the vial holds 5 such draws.
How much bacteriostatic water for a 5 mg vial of TB-500?
Any volume the vial holds. 1 mL gives 5 mg/mL, 2 mL gives 2.5 mg/mL and 3 mL gives 1.67 mg/mL (rounded). A 1 mg draw is 20 units at 5 mg/mL, 40 units at 2.5 mg/mL and 60 units at 1.67 mg/mL.
How many 2.5 mg draws does a 10 mg vial of TB-500 give?
10 mg divided by 2.5 mg is 4 draws. If the vial holds 2 mL (5 mg/mL), each draw is 0.5 mL, or 50 units, which is the full barrel of a 0.5 mL U-100 syringe.
Brands we recommend for TB-500. We are independent and have no affiliation with any brand: no affiliate links, no referral codes, no paid placements. These are the suppliers whose testing and certificates hold up when we check them.
- Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
- Core Peptides long track record, public certificates, wide catalog
- Ascension Peptides public third-party testing, clear pricing