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It supports cellular energy production and nerve health to make you feel less tired and prevent numbness
You can definitely opt for taking vitamin B12 supplements at night if that's what works best for you, although the natural energy-boosting abilities of vitamin B12 might be put to better use as you're starting the day

Metabolites 10 (5), 191

doi:10.1007/s00441-019-03016-8 Mayfield CK, Bolia IK, Feingold CL, et al
