過去研究過鋁，說鋁攝入過多可能與阿爾茲海默症（Alzheimer's）有關。這回研究的是銅。但最近的結果還是有爭議的，與過去的幾項研究結果相反。
Copper linked to Alzheimer's disease
By James Gallagher
Mixed evidence on the role of copper in Alzheimer's
A lifetime of too much copper in our diets may be contributing to Alzheimer's disease, US scientists say.
However, research is divided, with other studies suggesting copper may actually protect the brain.
The latest study in Proceedings of the National Academy of Sciences showed high levels of copper left the brain struggling to get rid of a protein thought to cause the dementia.
（發表於美國國家科學院院刊的一項最新的研究認為高水平的銅攝入或令銅在腦血管中積蓄並幹擾血腦屏障，使腦部難以排除可能引發癡呆症的蛋白質---澱粉樣蛋白（beta amyloid）。）
Copper is a vital part of our diet and necessary for a healthy body.
Tap water coming through copper pipes, red meat and shellfish as well as fruit and vegetables are all sources of dietary copper.
BarrierThe study on mice, by a team at the University of Rochester in New York, suggested that copper interfered with the brain's shielding - the blood brain barrier.
Mice that were fed more copper in their water had a greater build-up of the metal in the blood vessels in the brain.
The team said this interfered with the way the barrier functioned and made it harder for the brain to get rid of a protein called beta amyloid.
One of the hallmarks of Alzheimer's disease is the formation of plaques of amyloid in the dying brain.
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《中國好聲音》第二季- 第五期 劉彩星: 橄欖樹
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