Reconstitution chart: 5 mg vial
| BAC water added | Concentration | Draw for 1.6 mg dose | Draw for 0.5 mg dose |
|---|---|---|---|
| 1 mL | 5,000 mcg/mL | 32 units | 10 units |
| 1.5 mL | 3,333 mcg/mL | 48 units | 15 units |
| 2 mL | 2,500 mcg/mL | 64 units | 20 units |
| 2.5 mL | 2,000 mcg/mL | 80 units | 25 units |
Draws are U-100 insulin syringe units (100 units = 1 mL). Formula: dose in mcg ÷ (vial mcg ÷ water mL) × 100. The calculator above handles any other combination.
About Thymosin Alpha-1
Thymosin Alpha-1, often shortened to TA1, is a peptide naturally produced by the thymus gland that plays a role in regulating immune response. It is genuinely approved as a drug in a number of countries (sold as Zadaxin) for hepatitis B and C and as an adjunct in some other conditions, though it is not FDA approved in the United States. That gives it more real clinical backing than most compounds on this site, even where it remains unapproved.
The most frequently cited protocol traces to the hepatitis trials: 1.6 mg subcutaneously twice weekly. Daily research protocols using smaller amounts, often 300 to 500 mcg, also circulate. Notice the page defaults to the 1.6 mg figure because it is the best-documented one, but it converts whatever your protocol specifies. The unit toggle covers both the milligram and microgram framings so you can match however your source wrote the dose.
The math is the same as any lyophilized peptide. From a 5 mg vial with 1 mL of BAC water, the 1.6 mg dose is a 32 unit draw; with 2 mL it becomes 64 units. At 1.6 mg twice weekly, a 5 mg vial holds three doses, a little over a week, so supply math matters and the doses-per-vial line tracks it. Smaller daily microgram doses stretch a vial much further. Refrigerate after reconstitution and respect the beyond-use window your source states.
Quick facts
- Status: approved as a drug (Zadaxin) in several countries for hepatitis B and C; not FDA approved in the US
- Best-documented protocol: 1.6 mg subcutaneously twice weekly
- Smaller daily research doses of 300 to 500 mcg also circulate
- Common vial sizes: 5 and 10 mg
Stop gambling on where you buy your peptides.
The calculator tells you how much to draw. The Verified Buyer's Manual tells you how to source the peptide itself without getting scammed or shipped underdosed product. Trace any compound back to the lab that made it, read a Certificate of Analysis and catch a fake, grade any seller before you pay, and price it right. A repeatable system, not a list of names that goes stale.
- How to read a lab report (COA) and spot a faked or misattributed one
- Source tracing: find verified sellers yourself from public test data
- The vetting grid: a yes-or-no scorecard for any seller
- Real cost-per-mg math so you never overpay
- Reconstitution, storage, and the first 72 hours after a package lands
Supplies you will need
Affiliate links: HowMuchPep may earn a small commission if you buy through these, at no extra cost to you. We do not sell these products and do not endorse any brand.
Get the 1-page Reconstitution Cheat Sheet
The formula, the unit conversions, a quick-reference dosing table, and the four checks to run before you inject. Free, sent straight to your inbox. Print it and keep it next to your vials.