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TB-500 and Acetic Acid Mix

TB-500 Reconstitution Calculator

Reviewed by · Pharmacist and Scientific Reviewer

Enter the amount you want to measure. The vial buttons will highlight which vial strengths create cleaner syringe-unit measurements.

⚠ Use acetic acid — not bacteriostatic water TB-500 is insoluble or unstable in standard BAC water. Manufacturer protocols require reconstitution in dilute acetic acid (0.1%) — or, for IGF-1 variants, 50 mM acetic acid. Volumes shown below refer to acetic acid, not water.

What amount do you need?

Type the target amount, then choose mg or mcg. Example: 2mg or 500mcg.

Work the dose out from body weight

Syringe size:
Possible vial strengths:
Best Match Good Match Usable Harder to Measure

Example TB-500 Titration Schedule

PhaseDoseFrequency
Loading2–2.5 mg2× per week ×4–6 wks
Maintenance2–2.5 mg1× per week ×4–8 wks
Rest—4–8 weeks off

Standard community dose is 2–2.5 mg — about 4× the listed 300–1,000 mcg (a minority daily low-dose variant). Reconstitution: 10 mg vial + 2 mL bacteriostatic water = 5 mg/mL (50 units = 2.5 mg). The fragment has zero human trials; parent thymosin beta-4 human data are topical/IV only.

Possible vial strengths:

What Is It?

TB-500

Synthetic thymosin beta-4 fragment.

Acetic Acid (0.1%)

A dilute solution of acetic acid (typically 0.1% for most peptides, or 50 mM for IGF-1 variants) used to reconstitute peptides that are insoluble or unstable in standard bacteriostatic water. TB-500 requires an acidic carrier to dissolve fully and remain stable — plain BAC water will not work and may damage the peptide.

How To Mix TB-500

1
Clean

Use alcohol swabs to clean the tops of both vials.

2
Draw Acetic Acid

Draw the selected amount of 0.1% acetic acid.

3
Inject Slowly

Add the liquid slowly down the side of the vial.

4
Swirl Gently

Do not shake. Swirl gently until dissolved.

5
Store Properly

Store as directed and protect from heat and light.

Best Practices & Common Mistakes

Best Practices

  • Use sterile technique.
  • Protect from light and heat.
  • Store refrigerated when appropriate.
  • Use clean syringe-unit math before measuring.

Common Mistakes

  • Confusing milligrams with milliliters.
  • Choosing an option with awkward decimal units.
  • Using too little liquid for very small measurements.
  • Shaking the vial aggressively.

TB-500 Storage & Handling

Lyophilized Powder: −20°C (−4°F) for long-term storage (up to 24 months). Refrigeration 2–8°C (36–46°F) for short-term use (up to ~3 months). Original sealed vial in the freezer is safest.
Reconstituted Solution: 2–8°C (36–46°F), use within ~7–14 days. Keep sealed, avoid light, and do not repeat freeze-thaw cycles.

Frequently Asked Questions

TB-500 is a synthetic fragment of thymosin beta-4 (Tβ4), a natural repair protein found in nearly every cell. The fragment keeps Tβ4's active actin-binding region and is studied as a "healing" peptide — not a steroid, and not a hormone.
In research and anecdotal use it's referenced in milligrams — commonly around 2–5 mg per week by subcutaneous injection, often split into smaller doses, with a higher "loading" period followed by less frequent maintenance. These are reference figures, not an approved regimen, and dosing is a clinical decision.
Add bacteriostatic water and swirl gently — don't shake. A 5 mg vial + 2.5 mL gives 2 mg/mL (2,000 mcg/mL), so a 2 mg dose = 1 mL = 100 units on a U-100 syringe. Use the calculator above for your exact vial size.
They heal through different mechanisms: TB-500 works by regulating actin and cell migration, acting systemically throughout the body, while BPC-157 leans on blood-vessel growth and works more locally. TB-500 shows stronger animal signals in muscle, skin, and cardiac tissue; unlike BPC-157 it has no oral form, so it's injected. How anyone pairs them is a clinical decision, not something a calculator should merge.
Most of TB-500's reputation rests on animal studies — and importantly, the stronger human data is for full-length thymosin beta-4, not the TB-500 fragment that's actually sold. There's no human evidence it causes cancer, though its role in cell migration and vessel growth is a theoretical caution. It's not FDA-approved and is banned by WADA. Store the dry vial refrigerated and dark; once mixed, keep cold and use within a few weeks.
Practical takeaway: If your goal involves weight management, metabolic health, recovery, physical performance, cognitive function, appearance, or general well-being, discuss it with a licensed healthcare professional. They can help you evaluate approved, evidence-based options rather than relying on an unapproved or investigational compound. This calculator is intended only for transparent research-reference calculations and does not determine an appropriate amount, recommend use, or replace professional medical guidance.

More Healing & Repair calculators

BPC-157 GHK Basic GHK-Cu (Copper Peptide) LL-37 (CAP-18) KPV ARA-290 Thymagen B7-33

References

  1. PeptideDosingProtocols. TB-500 community protocol. 2026.

About the author

· Pharmacist and Scientific Reviewer

Maria Hrabina is a pharmacist and scientific reviewer with a strong interest in peptide science, pharmacology, and emerging therapeutic compounds.

Her work focuses on understanding how peptide-based compounds interact with biological signaling pathways and how they are being investigated across areas such as metabolic health, dermatology, recovery, regenerative research, and pharmaceutical development.

Maria follows research on a broad range of peptides, from compounds used in approved medicines to experimental molecules still being evaluated in laboratory, preclinical, and clinical studies.

Her approach combines scientific curiosity with critical evaluation of evidence. She believes promising mechanisms and early research deserve attention, but should not be presented as established clinical benefits until they are supported by adequate human data.

Her areas of focus include scientific literature review, mechanisms of action, pharmacology, pharmacokinetics, safety, pharmaceutical formulation, and the overall quality of evidence behind peptide-based compounds.

She is particularly interested in the process of translating an experimental molecule into a reliable pharmaceutical product — including compound characterization, purity, stability, formulation, dose selection, safety assessment, and controlled clinical trials.

Maria believes peptide science has significant long-term potential, but that its progress depends on rigorous research, high manufacturing standards, transparent safety data, and responsible scientific communication.

Through her writing, she aims to help readers understand both sides of peptide research: what makes these compounds scientifically promising and what questions remain before their potential can be considered clinically established.

Areas of interest: Peptide Science · Therapeutic Peptides · Peptide Pharmacology · Metabolic Peptides · Cosmetic Peptides · Drug Development · Pharmacokinetics · Drug Safety · Pharmaceutical Formulation · Emerging Therapies · Evidence-Based Medicine

Important: This tool is for informational and research-reference purposes only. Not intended for human or veterinary use.
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