Why was DHA brain-protective but not fish or EPA?
It seems odd and therefore significant that reduced risk of dementia in this study was linked to participants blood DHA levels, but not with their fish intake or with their blood levels of EPA, the other key omega-3 fatty acid in fish oil. The failure to find a link with fish seems strange for two reasons: Virtually all of the DHA measured in the participants blood came from the fish they ate. Several earlier studies found that dementia risks fall as fish consumption rises. However, as Dr. Morris said in her editorial, it is possible that the analysis was [too statistically] underpowered to observe a protective association of fish consumption, as the inverse relative risk was based on a relatively small sub- Death before dementia called increasingly uncommon Many people in developed countries live well into their 80s or 90s, and a new study suggests that dementia may become more common among them than believed. British scientists enrolled people aged 65 or older and examined them perio
