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A new study in rats suggests a lack of fiber in the diet is linked to memory problems in the aged brain, and points to the amygdala – the small structure governing emotional memories, especially related to bad experiences – as a brain region that’s particularly sensitive to highly processed foods.

Past studies in animals have shown that a highly processed diet is linked to memory problems and inflammation in the aged brain – and the effect can happen fast, after just three days of poor eating. A new study suggests another dietary pitfall could have a similar damaging effect in a similarly short amount of time in older adults: a lack of ...

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