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If not addressed, insufficient B12 levels can impact the production of red blood cells, nerve function, and overall vitality

A.RamirezV.et al

The Wilcoxon p -value for the significance of differences in hemoglobin concentration in samples, continuously divided according to different vitamin B 12 concentration (floating cut-off), is shown in Figure 3

If your cat has too much B12 in them, they just pee it out
