> The objective was to assess whether B12 levels within the current normal range in a cohort of healthy older adults may be associated with measurable evidence

> The objective was to assess whether B12 levels within the current normal range in a cohort of healthy older adults may be associated with measurable evidence of neurological injury or dysfunction. > inadequate amounts of vitamin B12 could induce neurological deficits at a threshold that is higher than the one in current use... Accordingly, our current understanding of optimal serum B12 may have to be revisited to account for the clinical manifestations of B12 inadequacy In short, people need more B12 than we think they need, and there are neurological symptoms that are getting ignored.