然而，研究人员发现，一个长期以来众所周知的使食物变色和变硬的过程也可能与年龄相关的细胞和组织损伤有关。

Nevertheless, researchers have discovered that a process long known to discolor and toughen foods may also contribute to age related impairment of both cells and tissues.

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这些成分可引起指甲下出血，变色，甚至使原本质地光滑的指甲变得粗糙。

These ingredients can cause bleeding under the nails, discolouration and can roughen the smooth texture of the nails.

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除了心率增加的可能性之外，还有无法入眠和使牙齿变色。 这是一杯咖啡对你健康的身体造成的伤害的两外一种方式。

Aside from the possibility of increased heart rate, trouble sleeping and discoloration of teeth, there's another a way that a cup of joe can be detrimental to your well being.

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