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Description
Researchers who skip this distinction frequently misinterpret divergent results between the two compounds, attributing mechanistic differences to dosing or model variation when the structural gap is the more plausible explanation

Rudenko A, Tsai LH

Safety Considerations and Who Should Pursue Injectable B12 Therapy Injectable B12 is generally well-tolerated
[1] Two very small human pilot studies (fewer than 20 subjects each) that cannot detect side effects occurring in fewer than 1 in 500 users

Leszczynska-Rodziewicz A, Szczepankiewicz A, Pawlak J, Dmitrzak-Weglarz M, Hauser J (2013)
