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The body cannot synthesise vitamin B12 independently and must obtain it through dietary sources, primarily animal products such as meat, fish, dairy, and eggs
In 2023, the FDA finalized its reclassification of several peptide compounds including BPC-157, TB-500 (thymosin beta-4), CJC-1295, ipamorelin, and others removing them from the list of bulk drug substances permitted for compounding under Section 503A and 503B of the Food Drug and Cosmetic Act
Much of the literature is mechanistic
However, if it persists, be sure to let your doctor know
TB-500 enhances ECM synthesis and organization through mechanisms involving both direct effects on fibroblast function and indirect modulation of the matrix microenvironment