Dietary verses plasma DHA in aging-related cognitive decline (ARCD), based on Lopez et al (2010). In Lopez et al. (2010), daily intake of 90 mg DHA in the elderly was associated with cognitive decline (ARCD+), whereas 160 mg of DHA was associated with an absence of cognitive decline (ARCD-), yet % DHA in plasma total lipids was not significantly different in the two groups. Though by no means conclusive, these data support our hypothesis that there may be a shift in DHA homeostasis in the elderly with ARCD