Low methionine levels can affect the production of A-adenosylmethionine (SAMe), a major methyl donor for the central nervous system and an essential nutrient required for the production of neurotransmitters
Although there was a clear trend for a higher Firmicutes : Bacteroidetes ratio in the WD control group relative to the LD control group, this difference did not rise to the level of statistical significance
Homocysteine is important to test in conjunction with MMA as a high level indicates a possible methylcobalamin deficiency, this is the second form of B12 that is important for methylation in the body, along with DNA/ RNA repair
The main difference is how and how often theyre taken
PMID 19891010
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