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Recovery & Repair

TB-500

Systemic recovery peptide for soft-tissue repair · 2.5 mg 2×/wk · 4–6 wk load + maintenance

Thymosin Beta-4 fragment · actin-binding peptide

A Thymosin β4-based peptide associated with recovery, mobility and flexibility — BPC-157's frequent partner in repair discussion.

€39.995 mg · LyophilizedIn stock

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Purity 99%+ HPLC

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Documentation CoA included

For laboratory and in vitro research use only. Not for human or veterinary use, and not for use in diagnostic procedures.

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ClassSynthetic peptide (Thymosin β4-derived)

Half-life~2–3 days

Typical routeSubQ

Cycle4–6 wk load + maintenance

CategoryRecovery & Repair

Price€39.99

🧾 View Certificate of Analysis

About TB-500

TB-500 is a synthetic peptide derived from Thymosin Beta-4 (Tβ4), a 43-amino-acid actin-binding protein expressed widely across mammalian tissue. Its principal biological partner is G-actin, which places it at the center of cytoskeletal dynamics, cell motility and tissue-organization research.

PX1 Labs supplies TB-500 as a 5 mg lyophilized powder verified at 99%+ identity purity by HPLC, with identity confirmed by mass spectrometry. A lot-specific Certificate of Analysis is included with every order.

What it's known for

TB-500 is best known for recovery and mobility, often paired with BPC-157. Here is what it is most associated with. (Supplied for laboratory research use only; not an approved medicine.)

Recovery

Known for supporting recovery, frequently alongside BPC-157.

Mobility & flexibility

A popular mobility and joint-comfort topic among athletes.

Cell migration

Associated with moving repair cells into place and organising healing tissue.

What research shows

Most data is from animal and cell studies; human evidence is limited.

TB-500 explainers

Curated clips from across social media.

Swipe for more clips →

How it works

TB-500 is based on the body's own protein Thymosin β4, which binds actin — the protein that drives cell movement. That places it at the centre of cell migration into a repair site and tissue organisation.

It is also associated with new blood-vessel formation and with inflammation settling, which is why it is so often mentioned alongside BPC-157 in recovery contexts.

What the evidence shows

Full-length Thymosin β4 has human trials (e.g. corneal healing, cardiac studies); most data on the TB-500 fragment itself comes from animal work. Importantly, full-length results do not automatically transfer to the fragment. Neither form is a widely approved medicine.

An educational summary, not a treatment claim or medical advice.

Side effects & safety

Reference information — not medical adviceSummarised from public research literature. PX1 Labs products are supplied for laboratory research use only; not for human or veterinary use.

Commonly reported

Temporary fatigue or 'head rush' after dosing
Mild injection-site irritation
Occasional light-headedness during the loading phase

Cautions & contraindications

Pro-angiogenic; avoid with active or prior cancers
No human safety trials
Avoid in pregnancy/breastfeeding
WADA-prohibited in sport

Dosage chart (reference only)

Commonly cited ranges — not a recommendationBeginner / standard / advanced figures collected from public, widely available community references. Provided for reference and comparison only — not a dosing instruction or medical advice. Supplied for laboratory research use only.

Beginner	Standard	Advanced
2 mg 2×/wk	2.5 mg 2×/wk	5 mg 2×/wk

Frequency	2×/week (loading)
Timing	Any time
Cycle length	4–6 wk load + maintenance
Typical route	SubQ

Convert any dose to a syringe draw →

Reference protocols

Reference only — not a recommendationThe figures below are commonly cited in public and community references. They are provided for reference and comparison only — not a dosing instruction, recommendation, or medical advice. PX1 Labs products are supplied for laboratory research use only; not for human or veterinary use.

Context	Commonly cited amount	Frequency
Loading	2–2.5 mg	2× weekly, 4–6 weeks
Maintenance	2–5 mg	1× weekly

Reconstitution example: e.g. 5 mg + 2 mL → 2.5 mg/mL; 2.5 mg = 1 mL (100 units).

Often a loading phase of 4–6 weeks, then a less frequent maintenance amount.

Work out your own draw in the calculator →

What researchers commonly report — by week

Commonly reported, not guaranteedThese timelines summarise what self-experimenters and widely available community sources describe. Individual results vary widely, many notice nothing on this schedule, and these are not promised outcomes. Reference information only — not medical advice. PX1 Labs products are supplied for laboratory research use only.

Week 1–2

Loading phase — frequently little is felt yet.

Week 3–4

Improved flexibility, range of motion and reduced stiffness commonly reported.

Week 6+

Cited for fuller recovery of older injuries; often paired with BPC-157.

Specifications

Every PX1 Labs lot is independently verified before dispatch. The figures below describe the product class; exact lot-specific results are documented on the Certificate of Analysis included with your order.

Compound class	Synthetic peptide (Thymosin β4-derived)
CAS number	77591-33-4
Molecular formula	C₂₁₂H₃₅₀N₅₆O₇₈S
Molecular weight	≈ 4963.4 g/mol
Identity purity	99%+ (HPLC)
Identity confirmation	Mass spectrometry
Presentation	5 mg lyophilized powder
Physical form	Sterile-filtered, freeze-dried
Storage	2-8°C; -20°C long term
Documentation	Lot-specific Certificate of Analysis

Documentation & quality

TB-500 passes the same five-stage PX1 quality process applied to every product: HPLC potency analysis, mass-spectrometry identity and purity confirmation, pH and stability validation, sterility and endotoxin (LAL) testing, and QC batch-consistency verification.

A lot-specific Certificate of Analysis ships with every order. The lot number printed on your vial matches the lot ID on the document, so the material on your bench can always be checked against the data on file.

References & research

Selected peer-reviewed literature on TB-500 (via PubMed), provided for educational context. A reference does not imply a clinical claim for PX1 Labs products.

TB-500 — questions

Is TB-500 the same as Thymosin Beta-4?

TB-500 is a synthetic peptide based on the actin-binding region of Thymosin Beta-4. Researchers should confirm the exact sequence and molecular weight for their lot against the Certificate of Analysis.

How should TB-500 be stored?

Sealed lyophilized vials are stable short-term at room temperature in a cool, dark place; refrigerate at 2-8°C or freeze at -20°C for longer storage and avoid repeated freeze-thaw cycles.

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TB-500

About TB-500

What it's known for

Recovery

Mobility & flexibility

Cell migration

What research shows

TB-500 explainers

Commonly reported

Cautions & contraindications

Specifications

Documentation & quality

References & research

TB-500 — questions

Often paired with

BPC-157

GHK-Cu

Tesamorelin

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Documented peptides, on your bench tomorrow.