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Tuna, salmon, poultry, beef, potatoes, spinach, bananas and fortified breakfast cereals are all good sources
(Reporting by Sriparna Roy, Sneha S K in Bengaluru, Amina Niasse in New York
Some research suggests it may help maintain telomere length, which is associated with aging
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Is it ok to take 1,000 mcg of B12 a day
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