TB-4 Fragment (Ac-SDKP)
The active N-terminal fragment of Thymosin Beta-4. Often considered the primary bioactive component driving TB-500's healing effects, with strong anti-inflammatory and angiogenic properties.
People use this for
Benefit Profile
TB-4 Fragment (Ac-SDKP)'s fingerprint across categories
Community Interest
Report volume over 12 months
Reported Benefits
3 of 3Anti-Inflammatory Effects
Strongly Positive"TB-4 Fragment seems more targeted than full TB-500. Inflammation markers dropped faster. Using lower doses too."
Angiogenesis & Healing
Positive"Blood flow to injured area improved noticeably. The fragment delivers the core benefit of TB-500 at lower doses."
Cardiac Tissue Support
Positive"Using TB-4 fragment for cardiac support. Research shows it protects heart tissue. Feel good about this one."
Reported Side Effects
Minor irritation at injection site.
Dosing Patterns
Most Popular: SubQ at 200-500 mcg
85% of community members report using this dosing protocol 2-3x weekly. Individual responses vary — start low and adjust based on your experience.
Commonly Stacked With
Frequently Asked
TB-4 Fragment (Ac-SDKP) is the active N-terminal portion of Thymosin Beta-4. Some researchers believe it delivers the core healing benefits of TB-500 at lower doses. Not FDA-approved.