Its an odd time of the night here in UK so Im giving you a quick reply
Methionine is then used to form S-adenosylmethionine (SAMe), which is a universal methyl donor essential for the synthesis of lipids, proteins, DNA, and the formation of myelinthe protective sheath around nerve cells
And always try to grill meat instead of frying it. Organ meats are incredibly rich in B12, but they also contain a large amount of cholesterol
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Your exhaustion and brain fog are not in your head
Vitamin B12 (cyanocobalamin) dosing, indications, interactions