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Why does vitamin B12 make me sleepy?

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B12 AND SLEEP: Those who can't get to sleep at night may need vitamin B12. Studies show that B12 causes an earlier release of melatonin at night which resets the sleep-wake cycle. (Melatonin has been called "the sleep hormone" because of its effects on sleep). B12 acts directly on the pineal gland to provoke a faster release of melatonin. read more

Fatigued, I was told by a nurse that those very deficient in B12 can feel tired as B12 works to create red blood cells and uses and depletes one's electrolytes, especially potassium. Supplementation of electrolytes should be taken a day before, during and even after taking B12 shots. Same with Sublinguals. read more

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