What are the pharmacokinetics of neurobion?

Neurobion is a vitamin B complex supplement, primarily containing thiamine (B1), pyridoxine (B6), and cyanocobalamin (B12). Its pharmacokinetics vary for each vitamin: thiamine is rapidly absorbed in the intestine and distributed widely in body tissues; pyridoxine is converted to its active form, pyridoxal phosphate, and is involved in amino acid metabolism; cyanocobalamin is absorbed in the ileum and requires intrinsic factor for optimal absorption. These vitamins are generally excreted in urine, with excess amounts eliminated rather than stored in significant quantities.