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Thymosin beta-4 (often written as T4 or TB4) is a naturally occurring peptide, and TB-500 (or fequesetide) is a synthetic peptide based on a segment of TB4.3 4 While TB4 is made up of 43 amino acids, TB-500 contains only seven.4 5 Sometimes, especially in earlier research, you may see TB-500 referred to by its amino acid sequence, Ac-LKKTETQ.6 Insider Tip: The Ac- before amino acid sequences, like those of peptides, means its been permanently modified with an added acetyl group a process called N-terminal acetylation to protect it from degradation.7 8 This can improve a peptides stability,9 bioavailability,10 and other properties.11 Though nearly all synthetic peptides are protected in one way or another during synthesis, this protection is usually reversible

Clin Cosmet Investig Dermatol

BPC157 5mg+ TB500 5mg Original price was: $105.00.Current price is: $85.00

Side effects and safety considerations in research In preclinical studies, BPC-157 is generally well tolerated

Adjust your dosing chart accordingly

Important caveat: the foundational 2014 mechanism paper was formally retracted in April 2025 due to falsified data no approved human clinical trials exist