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An expert reveals the 6 best vitamin B12 supplements you should take in 2026 These are the best B12 supplements on the market, according to a nutritional therapist Bookmark Vitamin B12 plays an important role in keeping your body functioning properly, although it's often overlooked

That means if one is experiencing a deficiency of vitamin B12 in the body, it can result in a bad mood, and decreased serotonin can lead to feelings of depression

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