TB-500 Dosage Chart: 500mcg/Day Healing Protocol

TB-500 is a synthetic 17-amino-acid fragment of Thymosin Beta-4, containing the active actin-binding domain responsible for cell migration and tissue repair. It's a cornerstone of healing peptide protocols, especially when stacked with BPC-157.

Research-context information only. TB-500 is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

Clinical Status: No human trials exist for TB-500 specifically. All protocols are extrapolated from Thymosin Beta-4 research and animal studies. This is not medical advice.

Quick Reference: Standard Protocol

Community-reported protocol: 500 mcg daily in the morning for 8 weeks, then 8 weeks off. TB-500 works systemically, so injection site location doesn't affect efficacy. For the full TB-500 profile, vendor pricing, and stacking options, see our TB-500 peptide page.

Cycling Details

The standard cycle is 8 weeks on, 8 weeks off. Tissue remodeling and healing effects build over 4-6 weeks and continue through the full 8-week window. Community protocols describe the off period as allowing receptor sensitivity to reset, with the rationale that cycling may prevent receptor downregulation — though no direct TB-500 human trial data exists to confirm this.

Unlike some peptides, TB-500 protocols use consistent daily dosing throughout the cycle — no loading or tapering needed. The daily schedule is a community convention — no published human pharmacokinetic study of TB-500 has established its half-life or an optimal dosing interval.

Enhanced Protocol (Community)

Note: The standard protocol above reflects the common community protocol. The enhanced protocol below is based on community experience.

Some users prefer twice-weekly pulsing for convenience. Weekly totals are similar, but daily dosing provides more stable tissue levels.

Routes of Administration

Subcutaneous (standard): Protocols describe injecting anywhere convenient — abdomen, thigh, upper arm. TB-500 distributes systemically regardless of site. A 29-31 gauge insulin syringe is commonly used.

Intramuscular: Occasionally used but offers no advantage over subcutaneous for a systemic peptide like TB-500.

Not recommended: Oral (peptide degradation), nasal (no data), topical (molecular weight too large).

Reconstitution Quick Reference

10 mg vial + 2 mL BAC water = 5,000 mcg/mL. A 500 mcg dose draws to 10 units on an insulin syringe under this reconstitution. One vial covers 20 days at this protocol.

Community protocols describe gentle swirling — not shaking — then refrigerating at 2-8°C and using within 28 days. For the full step-by-step walkthrough, see the TB-500 Reconstitution Guide.

Affiliate disclosure: vendor links in this article are affiliate links — The Peptide Catalog may earn a commission if you buy through them, at no additional cost to you.

Where These Numbers Come From

Community TB-500 dosing is extrapolated from Thymosin Beta-4 research, adjusted for molecular weight differences.

Phase I Human Safety (Ruff et al., 2010): IV doses up to 1,260 mg were well-tolerated in healthy subjects with no dose-limiting toxicities — linear pharmacokinetics across the dose range.

Animal Efficacy Studies: Standard research dose of 6-30 mg/kg in rodents. Cardiac protection at 6 mg/kg IV twice weekly (Bock-Marquette et al., 2004).

Scaling logic: TB-500 is the 17-23 amino acid fragment (~845 Da) of full TB-4 (~4,921 Da). Pro-rata scaling from TB-4 protocols of 2-10 mg/week gives 0.34-1.7 mg/week. The community settled on 3.5 mg/week (500 mcg daily) — the middle of this range. The LKKTET motif in TB-500 captures the core actin-binding mechanism at a fraction of the cost (Malinda et al., 1999).

Stacking Protocols

TB-500 + BPC-157 (The Gold Standard Healing Stack)

Community protocols run both for 8 weeks on, 8 weeks off, or use the pre-mixed Wolverine Stack for convenience.

TB-500 + GHK-Cu

Good for skin healing, anti-aging, and cosmetic recovery protocols.

Side Effects & Safety

• Injection site irritation — mild redness, transient
• Mild fatigue — first week of use, typically resolves
• Transient muscle/joint aches — as healing ramps up
• Occasional headaches — uncommon
• Mild nausea — rare
• Theoretical cancer concern — TB-500 promotes cell migration; no studies show tumor promotion, but caution warranted with existing cancers
• No long-term human data — TB-500 specifically has no direct human trials

mg to Units Conversion

On a standard 100-unit insulin syringe, each "unit" equals 0.01 mL (so 100 units = 1 mL). Once TB-500 is reconstituted, the conversion from a target dose to syringe units depends on the chosen dilution.

The two reconstitution ratios most often described in community protocols are below.

Reconstitution A: 10 mg vial + 2 mL BAC water (5 mg/mL) — the standard dilution from the Quick Reference above.

Reconstitution B: 10 mg vial + 3 mL BAC water (3.33 mg/mL) — more BAC water for larger, easier-to-measure draws.

These conversions reflect the dilutions documented in community reconstitution protocols. They report how the math is described, not a recommended dosing schedule.