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The human body needs vitamin B12 to make red blood cells, nerves, DNA and to carry out many essential functions
Neurological Function : It supports the maintenance of the myelin sheath, which protects nerve fibres and ensures efficient nerve signal transmission
In people without pernicious anemia, about 0.5 g/day of B12 is reabsorbed by enterohepatic circulation in which B12-containing bile is secreted by the liver into the digestive tract where the B12 is then reabsorbed via intrinsic factor
Some algae that are advertised as a source of B12, such as spirulina, in fact, contain these analogues (Rizzo et al., 2016)
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell of the human body
