In Chicago, where memories are long anyway, 3,718 people who averaged 74 years old were well-studied over 6 years for memory loss, fuzzy thinking and other signs of cognitive decline.
Just 21% ate fish twice or more weekly. 36.3% ate fish once weekly.
- 42.6% of subjects rarely or never ate fish.
Those who ate fish twice weekly reduced their rate of cognitive decline by 13% ; once weekly by 10%, compared with those who rarely or never ate fish.
That’s saving 3 to 4 years of cognitive decline from aging.
Which fish? “…tuna fish sandwich, fish sticks/fish cakes/fish sandwich, fresh fish as a main dish, and shrimp/lobster/crab.”
Most of these fish are not rich in omega-3s. And even though the brain is made up of nearly 60% DHA, an omega-3 fatty acid, how much omega-3 was in the fish did not seem to matter, for memory or thinking.