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Whilst oral absorption is limited, regular consumption of mega-doses can elevate serum levels substantially
500 g three times per week for 6 months, 80 or intrathecally (into the cerebrospinal fluid) 2500 g per month for several months
Researchers primarily examine its effects on vital organs such as the liver, kidneys, and heart
Many of these home kits only measure total B12, and not other markers in your blood, such as methylmalonic acid or homocysteine, which are better signs of deficiency, Ren says
Frequency depends on your health goals and baseline B12 levels
A: Anyone experiencing fatigue, brain fog, low mood, or frequent illness
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