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That matters because the marketplace often blurs TB-500 with full-length thymosin beta-4 and sells both under the same umbrella

Milewicz DM, Braverman AC, De Backer J, Morris SA, Boileau C, Maumenee IH, Jondeau G, Evangelista A, Pyeritz RE

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The FDA has classified BPC-157 in Category 2 for bulk drug substances, citing possible safety issues in compounding, such as immunogenicity, impurities, and insufficient safety evidence for suggested administration routes