Did you know that there seems to be a connection between Vitamin B 12 and a risk of brain shrinkage? A study published in the journal Neurology analyzed low levels of vitamin B12 that still fell within the normal range. Results showed that older individuals with low levels of vitamin B12 seemed to be at increased risk for brain atrophy, which is associated with Alzheimer's disease and impaired cognitive function. Although all participants had B12 levels within the normal range, there was a difference between the higher levels and the lower levels in terms of brain shrinkage. Ongoing research seeks to evaluate whether B vitamins can be recommended as a treatment.