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Learn more in the B-12 section of our B Vitamin Supplements Review, which includes our and other Top Picks for vitamin B-12 B vitamin supplements
Older age : Due to changes in dietary nutrient intake (usually from eating less overall) and also decreased production of stomach acid, the elderly tend to have reduced levels of vitamin B12
The standard research protocol is 300 mcg per day, subcutaneous, administered in a fasted state, typically in the morning before food or exercise
Mood & Serotonin Regulation : Acts as a vital co-factor in synthesizing neurotransmitters like serotonin and dopamine, helping stabilize mood and ease anxiety
Having an autoimmune disease : Some autoimmune diseases can damage the stomach lining (including pernicious anemia) where intrinsic factor is produced
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