effectiveness of b12 injections Feeling tired, foggy, or run-down? It could be a deficiency π§ β‘ β Weekly B12 help support: β’ Increased energy + reduced fatigue β’ Sharper focus + better mood β’ Boosted The Benefits Of Vitamin B12
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e071725e071725, www.bmj.com/content/383/bmj-2022-071725, Dangour, Alan D, et al

So if they get to the point that they aren't eating for a day or two it's important to make an appointment with your vet right away
While most people get enough B12 through diet, certain groups might benefit from B12 injections or supplements

doi: 10.1038/clpt.2010.57

"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice." Biochemical Pharmacology
[1] This characteristic has led to the widespread belief that vitamin B12 toxicity is virtually impossible
