The Effects of Food on Daily Thinking Ability
Briefly

Studies indicate that while a healthy diet can reduce cognitive decline with aging, its impact on immediate intelligence for young and middle-aged adults is minimal.
While foods like coffee or dark chocolate can provide short-term boosts in mental processing speed, lasting cognitive benefits from diet take much longer to manifest.
The Mediterranean diet, rich in fruits, vegetables, and fish, is recognized for its potential in lowering dementia risk, but does not directly enhance cognitive function in the short term.
Research shows that poor dietary habits over a lifetime lead to obesity, which severely hampers overall cognitive function, illustrating the long-term consequences of diet.
Read at Psychology Today
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