What is the half-life of Thymosin Alpha-1?

Thymosin Alpha-1 has an approximate elimination half-life of 2 h. Short-acting — protocols usually dose daily.

How long does Thymosin Alpha-1 stay in your system?

Roughly 97% of a dose has cleared after five half-lives — about ~10 h for Thymosin Alpha-1. That is the window that matters for washouts, bloodwork and surgery.

How is Thymosin Alpha-1 taken?

Thymosin Alpha-1 is typically administered by the subcutaneous route. Clinical range: ~1.6 mg subcutaneous twice weekly.

What are the risks of Thymosin Alpha-1?

Approved abroad, not by the US FDA for general use Injection-site reactions possible Discuss with a clinician if immunocompromised

Thymosin Alpha-1

zadaxin thymalfasin ta-1 talpha 1

Approved immune peptide (Zadaxin). Clinical history for hep B/C; protocol + tracking guidance.

Half-life: 2 h
Out of system: ~10 h
Route: Subcutaneous
Level: Intermediate

Short-acting — protocols usually dose daily. After the last dose, roughly 97% has cleared in ~10 h (five half-lives) — the window that matters for washouts, bloodwork and surgery.

What Thymosin Alpha-1 is used for

Approved immune peptide (Zadaxin) — modulates T-cell immunity
Clinical history for hepatitis B/C and as a vaccine adjuvant

How it's typically used

Clinical range: ~1.6 mg subcutaneous twice weekly.

What to watch for

Approved abroad, not by the US FDA for general use
Injection-site reactions possible
Discuss with a clinician if immunocompromised

Common questions

What is the half-life of Thymosin Alpha-1?: Thymosin Alpha-1 has an approximate elimination half-life of 2 h. Short-acting — protocols usually dose daily.
How long does Thymosin Alpha-1 stay in your system?: Roughly 97% of a dose has cleared after five half-lives — about ~10 h for Thymosin Alpha-1. That is the window that matters for washouts, bloodwork and surgery.
How is Thymosin Alpha-1 taken?: Thymosin Alpha-1 is typically administered by the subcutaneous route. Clinical range: ~1.6 mg subcutaneous twice weekly.
What are the risks of Thymosin Alpha-1?: Approved abroad, not by the US FDA for general use Injection-site reactions possible Discuss with a clinician if immunocompromised

About Other research compounds

What they are: Nootropics, metabolic agents, and research compounds that don't fit the other classes.
How they're run: Route and schedule vary widely — check the individual entry.
What to watch: This is the least-characterised corner of the atlas. Read the full guide, and treat anything without published human data as exactly that.

Full guide

Thymosin Alpha-1 (TA1): A Tracking Guide for an Approved Immune Peptide

What Thymosin Alpha-1 is, its approval history as Zadaxin, typical protocol shapes, and how to track an immune-focused cycle.

Other other research compounds

Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.