When researchers tried to tease out the protective components, the critical ingredients appeared to be the diet’s high vegetable content and lower ratio of saturated to unsaturated fats.112 This conclusion aligns with that of the Harvard Women’s Health Study, which found that higher saturated fat intake (sourced predominantly from dairy, meat, and processed foods) was associated with a significantly worse trajectory of cognition and memory. Women with the highest saturated fat intake had a 60–70 percent greater chance of cognitive deterioration over time. Women with the lowest saturated fat
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