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Thats at least in part because some foods that dont naturally contain riboflavin are commonly fortified with it
Another study conducted by the University of California found that B12 supplements improved energy levels and reduced fatigue in individuals with chronic fatigue syndrome
Your daily habits
Storage Store in cool and dry place do not above 25C, protect form light
If you have tried oral B12 before and felt no change, this may be part of the reason, and it is worth mentioning to your provider
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