The liver stores substantial quantities of vitamin B12, and hepatocellular damagefrom conditions such as cirrhosis, hepatitis, or hepatocellular carcinomacan release these stores into the bloodstream
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Residual solvents: Are manufacturing solvents controlled when relevant
Additionally, vitamin B12 deficiency can cause neurocognitive manifestations including depression, episodes of psychosis, delirium, dementia, poor memory performance, and cognitive impairment ( In 1978, Carney and Sheffield found that 31% of patients suffering from depression had low serum vitamin B12 levels (65)
Unexpectedly, in a different project surveying tRNA modifications in certain bacteria, N 341 was also identified in several bacterial species