Thymosin Alpha-1 Half-Life Calculator
Thymosin alpha-1 is unusual in this catalogue: it is an approved medicine in a number of countries, with a regulatory dossier behind it, even though it is not approved in the United States. This calculator charts its curve from published pharmacokinetics.
Half-life 2 hours · peaks at 2 hours
Every 3.5 days.
Half-life
Left at next dose
Thymosin Alpha-1 · twice weekly · levels plateau after ~10 hours
Steady-state peak
0.97 mg
Steady-state trough
0 mg
Accumulation
None
At twice weekly, each dose has essentially cleared before the next one — levels don't accumulate, they repeat the same rise and fall. Clearance after a dose takes about 10 hours.
This is a modelled estimate of relative levels from published half-life and time-to-peak figures — not a measured blood concentration. Individual pharmacokinetics vary.
Based on a published Thymosin Alpha-1 half-life of about 2 hours. The chart models RELATIVE levels from a unit dose — enter your own figures to see the shape. It is not a dose recommendation.
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What a 2 hours half-life means in practice
A half-life of 2 hours against twice a week dosing means each dose has essentially cleared before the next arrives. That shapes the curve in three ways:
1. One half-life
Half the dose is gone after 2 hours. After two half-lives 25% remains, after three 12.5%.
2. What's left at the next dose
Dosing twice a week means the next dose lands 3.5 days later, with about 0% of the previous one still present.
3. Accumulation and plateau
Almost nothing carries over, so levels don't accumulate — each dose repeats the same rise and fall, clearing in about 10 hours.
Worked example
Thymosin Alpha-1 has a half-life of 2 hours. Dosing twice a week, the next dose arrives 3.5 days later with about 0% of the previous one still on board. That's little enough that levels don't build up: each dose rises and falls on its own, clearing in about 10 hours.
An approved medicine in some jurisdictions
Thymosin alpha-1 is a 28-amino-acid peptide originally isolated from thymic tissue, with a role in modulating T-cell function. It has been approved in a number of countries for indications including chronic hepatitis B, and carries the kind of regulatory dossier most compounds discussed alongside it do not.
It is not approved in the United States, which is a common source of confusion — 'approved somewhere' and 'approved here' are different statements, and the second is the one that determines lawful supply in a given jurisdiction. Its half-life is measured in hours, so on any multi-day interval each administration clears before the next.
Frequently asked questions
This calculator is provided for informational and educational purposes only and is not medical advice. Always confirm dosing with a qualified healthcare professional and double-check your own measurements before administering anything.
Built by the Pep AI team.