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A handful of studies have linked fish-heavy diets with reduced risk of mental decline in old age.

多种研究表明，侧重于鱼类的饮食可降低年老时脑力下降的风险。

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Delays in mental decline of even up to six months are viewed as having considerable implications for individuals, their families and public health.

在精神衰退上的延迟能达到六个月对个人，他们的家庭和公众健康就已经相当有意义了。

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They were assessed to ensure they had not suffered any mental decline before the study began, and were assessed regularly during the trial.

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After 18 months, the average mental decline in the DHA and placebo groups was nearly identical, as measured on two separate tests and rating scales.

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