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Peptide guide · Recovery

TB-500: the evidence, status, and research questions.

TB-500 guide to human and preclinical evidence, research uses, FDA status, sport status, primary sources, and key limits.

Published Evidence reviewed August 7, 20262 inspectable sources7 min read
01What is TB-500?02What is the evidence for TB-500?03What is TB-500 being studied for?04Is TB-500 FDA approved?05Is TB-500 prohibited in sport?06What are the evidence limits for TB-500?

EVIDENCE TAKEAWAY

The short answer.

The first question for TB-500 is entity identity: evidence about full-length thymosin beta-4 should not be treated as direct evidence for every TB-500 product.

WHAT IS TB-500?

Start with identity.

A marketed name for a synthetic thymosin-beta-4-related fragment; product identity and evidence are often conflated with full-length thymosin beta-4.

Entity type
Peptide fragment
Research category
Recovery
Names and aliases
TB-500

HUMAN VS PRECLINICAL

What evidence exists for TB-500?

HUMAN EVIDENCE
1/5 · Very limited

Human studies of full-length thymosin beta-4 cannot automatically be transferred to products marketed as TB-500.

PRECLINICAL EVIDENCE
3/5 · Related preclinical work

Much of the cited tissue-repair literature concerns thymosin beta-4 rather than a verified TB-500 product.

RESEARCH INTENT

What is TB-500 being studied for?

Current source-backed research areas include the topics below. Inclusion means the area is being investigated; it does not establish a treatment benefit.

  • 01Actin biology
  • 02Tissue repair
  • 03Cell migration
  • 04Angiogenesis

U.S. REGULATORY STATUS

Is TB-500 FDA approved?

Not FDA approved; product identity and peptide-related impurities are material uncertainties.

SPORT STATUS

Is TB-500 prohibited in sport?

Prohibited at all times under the 2026 WADA List (S2).

Anti-doping rules and product ingredients can change. Athletes should verify the current official list and the exact product before making a real decision.

EVIDENCE LIMITS

What can the current record not establish?

COMMON SEARCH INTENTS

Reviewed questions about TB-500.

Evidence

What is the evidence for TB-500?

The first question for TB-500 is entity identity: evidence about full-length thymosin beta-4 should not be treated as direct evidence for every TB-500 product.

2 sources Research

What is TB-500 being studied for?

Current source-backed research areas include Actin biology, Tissue repair, Cell migration, Angiogenesis. These areas describe investigation, not established personal benefit.

2 sources FDA status

Is TB-500 FDA approved?

Current U.S. status for TB-500: Not FDA approved; product identity and peptide-related impurities are material uncertainties.

2 sources Sport status

Is TB-500 prohibited in sport?

Current sport-status snapshot for TB-500: Prohibited at all times under the 2026 WADA List (S2).

2 sources Evidence limits

What are the main evidence limits for TB-500?

Name similarity is not evidence equivalence.

2 sources Decision question

What is the evidence for BPC-157 and TB-500?

Both are promoted for recovery far beyond the human evidence. The main differences are the shape of the preclinical literature and the identity problem around TB-500.

4 sources

PRIMARY AND OFFICIAL SOURCES

Inspect the research behind this guide.