Following injection of lambs with 1mL from 3 weeks of age (at tailing), vitamin B12 levels would be expected to be maintained at adequate concentrations for 180 days (4.5 months), and in some cases up to 200240 days (5-6 months)
Additionally, the intramuscular route allows for a larger volume of the vitamin to be delivered at once, which can be particularly beneficial for those with severe deficiencies
Hannibal L, Lysne V, Bjorke-Monsen AL, Behringer S, Grunert SC, Spiekerkoetter U, Jacobsen DW, Blom HJ
Unlike oral B12, which depends on intrinsic factor and healthy gut absorption, the injection delivers B12 directly into the bloodstream
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