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Taking a supplement may improve your energy level, but only if youre deficient in this vitamin
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Vitamin B12 deficiency is primarily caused by autoimmune pernicious anemia, dietary restrictions such as vegetarian or vegan diets, and medical conditions that interfere with absorption such as celiac and Crohns disease
Most cats return to normal quickly
For those receiving B12 injections, energy levels and mental clarity typically improve within 24 to 72 hours
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