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Currently there is no established upper limit for B12 due to the low potential for toxicity
TABLE 4 Newcastle - Ottawa quality assessment scale for case-control studies
You Have Mood Changes People who dont get enough B12 tend to have high levels of homocysteine, which interferes with the signals going to and coming from your brain
Metformin, commonly prescribed for type 2 diabetes, is well-known to cause diarrhoea and is also associated with B12 deficiencymeaning patients may be taking both simultaneously
Associations of nicotinamide N-methyltransferase gene single nucleotide polymorphisms with sport performance and relative maximal oxygen uptake
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