APOE4 mice rely more on the plasma DHA than APOE3 mice, especially in glia morphology and cognitive performance.

The metabolism of docosahexaenoic acid (DHA), an omega‐3 fatty acid, is different in APOE4 carriers. Brain relies on the plasma DHA pool for its need but the plasma‐liver‐brain axis in relation to cognition remains obscure. We hypothesized that this relation is compromised in APOE4 mice considering the differences in fatty acid metabolism between APOE3 and APOE4 mice.