02/06/2026
Switching to a Healthier Diet May Repair Some Cognitive Damage — but Sugar’s Effects Could Be Permanent, Animal Studies Suggest
Evidence that what we eat shapes long-term brain health has been building steadily for years. A new review published in the journal Nutritional Neuroscience now adds an important and sobering dimension to that picture: while switching from an unhealthy to a healthier diet can partially restore cognitive function, the damage caused specifically by high-sugar diets may prove significantly harder — and in some cases impossible — to reverse, even after dietary habits improve.
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