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If your body has trouble absorbing B12 from food or oral supplements, injections can be a game-changer
It says 4 caplets provide 20% of the normal daily requirement
Find out what a recent study showed in the Folate section of our B Vitamin Supplements Review, which includes our Top Picks for folate and other B vitamins
But the specific synergy remains theoretical
Additional information Competing interest The authors declare that they have no competing interests
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