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ConsumerLab explains why taking too much vitamin B-12 can be harmful

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Adequate B12 is linked to better concentration, faster recall, and reduced brain fog, especially in adults over 40, in anyone on a plant-forward diet, and in patients with the MTHFR gene variant that affects how the body processes folate and B12

doi: 10.1016/j.jobcr.2025.06.006 35 KumarADavuluriGWelchNKimAGangadhariahMAllawyAet al

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