What is the half-life of Thymosin Beta-4?

Thymosin Beta-4 has an approximate elimination half-life of 1.0 d. Daily dosing holds steady levels.

How long does Thymosin Beta-4 stay in your system?

Roughly 97% of a dose has cleared after five half-lives — about ~5 days for Thymosin Beta-4. That is the window that matters for washouts, bloodwork and surgery.

How is Thymosin Beta-4 taken?

Thymosin Beta-4 is typically administered by the subcutaneous route. Research range: ~2 mg subcutaneous weekly.

What are the risks of Thymosin Beta-4?

Limited human data; mostly preclinical Theoretical cell-growth concern — avoid with cancer history Not FDA-approved; sourcing quality varies

Thymosin Beta-4

thymosin beta-4tb4

Full-length parent molecule of TB-500. Broader anti-inflammatory and immune profile than the fragment.

Half-life: 1.0 d
Out of system: ~5 days
Route: Subcutaneous
Level: Advanced

Daily dosing holds steady levels. After the last dose, roughly 97% has cleared in ~5 days (five half-lives) — the window that matters for washouts, bloodwork and surgery.

What Thymosin Beta-4 is used for

Parent molecule of TB-500 — broad tissue repair + anti-inflammatory action
Studied for wound healing and immune modulation

How it's typically used

Research range: ~2 mg subcutaneous weekly.

What to watch for

Limited human data; mostly preclinical
Theoretical cell-growth concern — avoid with cancer history
Not FDA-approved; sourcing quality varies

About Healing & recovery

What they are: Repair peptides — short amino-acid chains studied for soft-tissue, tendon, and gut-lining healing. Almost all the evidence is animal or preclinical; human trials are scarce.
How they're run: Reconstituted from a lyophilised (freeze-dried) powder and injected subcutaneously, usually daily, in blocks of 4–6 weeks around a specific injury.
What to watch: None are approved drugs, so purity depends entirely on the source. Effects are gradual — judge a block by whether the injury measurably improved, not by how you feel on day 3.

Full guide

Thymosin Beta-4 (TB4): The Parent Molecule, Not the TB-500 Fragment

What full-length TB4 is, how it differs from the TB-500 fragment, and how to track a cycle if you choose to run the parent peptide.

Other healing & recovery

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.