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Unlike the crash associated with caffeine, B12 supports your natural energy cycles
Endotoxin can compromise cell-culture and other sensitive research, and many vendors skip it
Another B12 shot side effect is diarrhea, though its usually pretty mild
Both matter for making informed decisions about your treatment
The distribution of values was tested by the one-sample KS test, and data are presented as the mean +/ SD or as median and IQR, where appropriate
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