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If youre losing weight without altering your diet or exercise habits, it might be worrisome
In addition to increased energy, individuals may also experience improvements in mood, cognitive function, and mental clarity within a few days to a week
Consequences of B12 deficiency range from fatigue, vision loss and constipation to neurological problems, psychiatric problems and certain types of anemia
Other good sources include salmon with 3 mcg for 3 ounces and tuna with 2.5 mcg for 3 ounces [1]
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