Dispose of the needle properly
3.4 Changes in serum homocysteine by supplementation route and dosage Analysis of 10 comparisons showed that vitamin B12 supplementation was associated with a mean reduction of 35.8% in serum homocysteine concentrations (Supplementary Table S5)
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in this species, urinary levels appear to be more concentrated than serum levels (urinary MMA concentration can be up to 40 times higher than serum concentration) [17]
A lack of it can cause tiredness, changes in the nervous system, and megaloblastic anemia
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