Elderly people with higher blood levels of vitamins B, C, D, E and omega 3 fatty acids performed better in mental acuity tests and suffered less brain shrinkage typical of Alzheimer’s disease – while “junk food” diets had the opposite effect.
This recent study is among the first to measure a wide range of blood nutrient levels instead of using less precise data such as food questionnaires.
Bowman GL, Silbert LC, Howleson D, Dodge HH, Traber MG, Frei B, Kaye JA, Shannon J, Quinn JF (2012). Nutrient biomarker patterns, cognitive function, and MRI measures of brain aging. Neurology.78:1-1