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Additional dose groups (including higher single-dose ranges) have been discussed in regulatory/nomination documents

Thats why many treat them like medication

[63] Key to the appeal's success was the treatment of evidence: the CAS rejected the AFL Tribunal's approach, known as "links in the chain", where any individual chain of evidence is dismissed if any one link within it cannot be proven, and endorsed WADA's approach, known as "strands in the cable", where individual evidence chains with missing links may still be accepted if the combination of all such chains forms a sufficiently strong case

This fundamental characteristic makes a true vitamin B12 overdose exceptionally rare in clinical practice