Thymosin Beta-4 dosing & administration
The body's natural healing peptide that accelerates tissue repair and reduces inflammation
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Dosing
How much do I take?
Subcutaneous injection: A small injection into the fatty layer just under the skin — the same way insulin is given.
Bioavailability High — most of the dose reaches your bloodstream, just more gradually than an IV.
2-5 mg (community injectable practice for 'TB-500')
Frequency
Once or twice weekly
Duration
4-6 week loading phase, then weekly maintenance
Documented community/research-practice injectable dosing for tissue repair; thymosin beta-4 has ~100% bioavailability by the subcutaneous route [1]. Not an FDA-approved use.
Timing
Best time to take
Morning or evening (flexible)
With food?
Not affected by food intake
If stacking
Best administered on different days than other injectable peptides to minimize injection site stress
Adjusting your dose
Increase if
- Healing is slower than expected after 3-4 weeks
- Inflammation remains high despite initial treatment
- Underlying injury is more severe than initially assessed
Decrease if
- Injection site reactions become bothersome
- Excessive bruising or swelling develops
- Systemic sensitivity symptoms appear
Signs of right dose
- Visible improvement in wound appearance by week 2-3
- Reduced pain and inflammation
- Improved range of motion around injured area
- Faster scar maturation
Administration
How do I use it?
Reconstitution
What you need
Injection
Route
Subcutaneous
Best sites
Storage
Before reconstitution
Keep in original vial at 2-8°C. Protect from light and freezing. Stable for 36+ months when properly stored
After reconstitution
Store at 2-8°C in refrigerator. Do not freeze reconstituted solution
Signs of degradation — discard the vial
Sample daily schedule
Monday morning
2-5 mg injection
Site: Lower abdomen or outer thigh
First dose of the week (loading phase)
Thursday morning
2-5 mg injection
Site: Opposite thigh or upper arm
Second dose of the week (loading phase, then transition to maintenance)
Weekly (maintenance)
2 mg injection
Site: Rotate between abdomen, thighs, and arms
After 4-6 week loading phase, reduce to once weekly for maintenance
Safety
Is it safe?
Side effects
Commonly reported: Injection site redness, Injection site swelling
Less common: Temporary mild headache, Mild bruising at injection site, Transient fatigue
Stop and seek help if
- Severe allergic reaction or anaphylaxis
- Persistent injection site infection
- Significant systemic adverse effects
- Pregnancy is confirmed
- No improvement in healing after 12 weeks (reassess approach)
- Active systemic infection develops without antibiotic coverage
This is general educational information. Always consult with a healthcare provider before starting, stopping, or modifying any peptide therapy. Do not self-diagnose or treat serious medical conditions.
Published research
What the studies show
Goldstein AL, Hannappel E, Sosne G, et al. · 2012
This study investigated the properties and effects of Thymosin Beta-4, contributing to our understanding of its mechanism of action and potential therapeutic applications.
Philp D, Kleinman HK · 2010
This study investigated the properties and effects of Thymosin Beta-4, contributing to our understanding of its mechanism of action and potential therapeutic applications.
Shrivastava S, Srivastava D, Olson EN, et al. · 2010
This study investigated the properties and effects of Thymosin Beta-4, contributing to our understanding of its mechanism of action and potential therapeutic applications.
Badamchian M, Fagarasan MO, Danner RL, et al. · 2003
This study investigated the properties and effects of Thymosin Beta-4, contributing to our understanding of its mechanism of action and potential therapeutic applications.
Sosne G, Ousler GW, et al. · 2022
RegeneRx Biopharmaceuticals (NCT01311518) · 2011
Head to head
Thymosin Beta-4 compared
Studied for
Conditions Thymosin Beta-4 has been researched in
Want the full picture?
The complete Thymosin Beta-4 research profile: mechanism of action, clinical studies, effectiveness timeline, and FAQ.