高烟酸摄入者中认知功能减退的发生率差不多只是低烟酸摄入者的一半（44%）。
The rate of cognitive decline among the high-niacin eaters was almost half (44 percent) that of those consuming less niacin.
膳食中烟酸摄入最少者比最多者罹患阿尔茨海默症的几率高80%以上。
Those with the lowest food intake of niacin were 80 percent more likely to be diagnosed with Alzheimer's disease than those with the highest intake.
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