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Several meta-analyses of observational studies have found elevated blood concentrations of homocysteine to be linked with an increased risk of dementia (74) or Alzheimers disease (68, 75-78)
Preparations containing benzyl alcohol are contraindicated for pregnant women and children due to potential toxicity risks
The speed of response depends on factors including the severity and duration of deficiency, the presence of neurological complications, and individual metabolic differences
Others are still very much in the trenches
When to Seek Medical Advice About B12 and Sleep Issues Whilst vitamin B12 supplementation rarely causes sleep disturbances, certain situations warrant medical evaluation