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The ratio of Firmicutes to Bacteroidetes is a commonly-studied change with an increase often linked to HFD consumption/obesity in mice 43,44 and humans 45,46 (for review, see John and Mullin, 2016 47 )
If sublingual B12 doesn't improve your symptoms after a few months, switch to B12 injections since cellular absorption is superior
We look for nerve function improvements in 3-6 months
It has also been reported to possess anti-stress properties, in addition to the ability to boost your immune system
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