Let's quickly break down what you're working with
TB-500 (10 mg) is a fragment related to thymosin beta-4, studied for roles in actin regulation (a key part of cell structure), cell migration, and tissue remodeling, which are relevant during recovery from soft tissue stress

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The FDA moved these peptides to Category 2 primarily due to a lack of large-scale, randomized, placebo-controlled human trials demonstrating their safety and efficacy