Ultraprocessed diets were linked to dementia risk, research suggests anesthesia is more like a coma than we thought, and a brain tumor radiation device shows promise. Read more in this week’s WSJ Health newsletter:

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3. Ultraprocessed diets were linked to dementia risk, research suggests anesthesia is more like a coma than we thought, and a brain tumor radiation device shows promise. Read more in this week’s WSJ Health newsletter: