Rats fed diets high in saturated fat underperformed on tests of learning and memory, and humans who live on such diets seem to be at increased risk for dementia.

• 喂食高饱和脂肪食物的老鼠在学习和记忆测试中表现不佳，而常吃这类食物的人类患痴呆的风险似乎增加了。