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Even meat-eaters can experience deficiency due to poor absorption, which often relies on a stomach-produced protein called intrinsic factor
The most well studied use of methylcobalamin has to do with sleep - although the exact mechanism of action is not yet clear, it is possible that methylcobalamin is needed for the synthesis of melatonin
The practical takeaway is that formulation quality and delivery method are not minor details, they are part of whether the peptide does anything at all
Understanding Fatigue: More Than Just Being Tired First, lets distinguish between ordinary tiredness and persistent fatigue
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