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Injectable or oral
Bile, urine, and feces were collected 072 h after administration
Its compact backbone and lack of extensive modifications distinguish it from stabilized peptide analogs, enabling its use as a model compound for studying peptide signaling, receptor interactions, and metabolic degradation pathways
NHS laboratories generally define deficiency as a serum B12 below approximately 148 pmol/L (equivalent to roughly 200 ng/L or pg/mL), though reference ranges vary between laboratories and results should always be interpreted in the context of local ranges and the patient's clinical presentation
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