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Many compounded versions come in multidose vials, requiring patients to measure their own doses, a practice that introduces significant room for error
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Use 29880 instead, since 29881 reported twice will trigger an NCCI edit
B12 is naturally found in animal foods
fragment-specific activity review: PMC8724243 TB-4 / TB-500 product mislabeling documented bidirectional mislabeling between full-length TB-4 (43 aa) and the TB-500 fragment (residues 1723) in marketed peptide products: Esposito M et al
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