correlational
Analysis v1
In Denmark and Norway, decreases in average IQ scores over time have been linked to lower quality of dietary protein consumed 7 to 11 years earlier, suggesting that nutrition during early childhood may affect cognitive outcomes later in life.
Evidence from Studies
Supporting (1)
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The study shows that when people ate less high-quality protein like meat and eggs, kids grew shorter and, over time, average IQ scores also dropped—suggesting what kids eat early in life can affect how smart they become.
Contradicting (0)
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No contradicting evidence found
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