Mixing 20 mg TB-500
Adding 2 mL of bacteriostatic water to a 20 mg vial of TB-500 gives 10 mg/mL: each 10 units on a U-100 insulin syringe holds 1,000 mcg. With 1 mL it's 20 mg/mL (2,000 mcg per 10 units); with 3 mL, 6.667 mg/mL (666.7 mcg per 10 units). More water makes small amounts easier to measure.
Bacteriostatic water chart for a 20 mg vial
Strength for each amount of water, and how much TB-500 10 units and 1 unit hold on a U-100 insulin syringe (100 units = 1 mL).
| Water added | Strength | Per 10 units (0.1 mL) | Per unit |
|---|---|---|---|
| 0.5 mL | 40 mg/mL | 4,000 mcg | 400 mcg |
| 1 mL | 20 mg/mL | 2,000 mcg | 200 mcg |
| 1.5 mL | 13.333 mg/mL | 1,333.3 mcg | 133.33 mcg |
| 2 mL | 10 mg/mL | 1,000 mcg | 100 mcg |
| 2.5 mL | 8 mg/mL | 800 mcg | 80 mcg |
| 3 mL | 6.667 mg/mL | 666.7 mcg | 66.67 mcg |
| 4 mL | 5 mg/mL | 500 mcg | 50 mcg |
| 5 mL | 4 mg/mL | 400 mcg | 40 mcg |
Units to draw for an amount (with 2 mL of water)
Arithmetic only, not a recommended amount. For what published studies actually gave, see TB-500 research. Use the calculator for other amounts or water volumes.
| Amount | Units | Volume |
|---|---|---|
| 100 mcg (0.1 mg) | 1 units | 0.01 mL |
| 250 mcg (0.25 mg) | 2.5 units | 0.025 mL |
| 500 mcg (0.5 mg) | 5 units | 0.05 mL |
| 1,000 mcg (1 mg) | 10 units | 0.1 mL |
| 2,000 mcg (2 mg) | 20 units | 0.2 mL |
| 2,500 mcg (2.5 mg) | 25 units | 0.25 mL |
| 5,000 mcg (5 mg) | 50 units | 0.5 mL |
Cheapest 20 mg TB-500 vials
One listing per vendor, vendors scoring 80%+ on Finnrick's independent lab testing, cheapest per mg first. Some links are affiliate links; rankings are by price only.
| Vendor | Listing | Price | Per mg | |
|---|---|---|---|---|
| Qingdao Sigma Chemical QSC Finnrick 64% | TB-500 20mg | 20-Vial Kit | Thymosin Beta-4 20 × 20 mg = 400 mg | $730.00 | $1.83 | Buy |
| Gulf Coast Aminos Finnrick 81% | TB-500 (TB4) 20mg 1 × 20 mg | $49.95 | $2.50 | Buy |
| NextGen Health Finnrick 80% | TB-500 20MG 1 × 20 mg | $64.00 | $3.20 | Buy |
| Eros Peptides Finnrick 77% | TB-500 20MG 1 × 20 mg | $76.49 | $3.82 | Buy |
| Skye Peptides Finnrick 57% | TB-500 Fragment (17-23) 20 mg 1 × 20 mg | $99.00 | $4.95 | Buy |
| Alpha BioMed Finnrick 47% | Thymosin Beta 4 (TB500) (20mg) 1 × 20 mg | $105.00 | $5.25 | Buy |
| Paramount Peptides Finnrick 64% | Thymosin Beta 4 (TB500) (20mg) 1 × 20 mg | $125.00 | $6.25 | Buy |
| Atomik Labz Finnrick 69% | TB-500 20mg Ten Pack 10 × 20 mg = 200 mg | $1,270.00 | $6.35 | Buy |
Questions people ask
How much bacteriostatic water do I add to 20 mg of TB-500?
Adding 2 mL of bacteriostatic water to a 20 mg vial of TB-500 gives 10 mg/mL: each 10 units on a U-100 insulin syringe holds 1,000 mcg. With 1 mL it's 20 mg/mL (2,000 mcg per 10 units); with 3 mL, 6.667 mg/mL (666.7 mcg per 10 units). More water makes small amounts easier to measure.
How many units is 100 mcg of TB-500 from a 20 mg vial?
With 2 mL of water (10 mg/mL), 100 mcg is 1 units on a U-100 syringe; with 1 mL it's 0.5 units.
Where can I buy 20 mg TB-500 vials?
8 independently tested vendors list 20 mg TB-500 vials; the cheapest right now is Qingdao Sigma Chemical QSC at $1.83 per mg ($730.00 for 20 × 20 mg = 400 mg).