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And when you're low, you feel it: exhaustion, brain fog, weakness, mood swings
Neutral overview: bacteriostatic agents (Wikipedia)
Improved Mood and Cognitive Function Vitamin B12 has been shown to improve mood and cognitive functions
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So, for every 500 ug of oral B12 supplement ingested, only 10 ug is absorbed
On the other hand, those with severe kidney problems taking high amounts of B12 may see a high level of toxicity since the excess vitamin B12 wont get eliminated from the body easily
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