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However, because B12 is stored in our livers, it might take a while for these deficiencies to show (Glass, 1959)
Enhanced Energy Levels: B12 plays a key role in energy metabolism, so adequate levels are essential for maintaining energy levels and combating fatigue
Great product and customer service Gave me a little bit of energy
You also need to take care of your diet and exercise regularly
Second, when two sources differ by that much, at least one of them is not describing what it claims to describe
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