If you overdose on highly toxic selenium, promoted as anti-ageing supplement, the effects will soon be apparent: garlic odour on breath and skin, fragile or black fingernails, metallic taste in the mouth, dizziness and nusea.

• 硒是作为一种抗衰老的补充元素而加以宣传的，如摄入过量，影响很快就会显现出来：呼吸和皮肤上会有大蒜的气味，指甲变脆变黑，嘴里有金属味，头晕、恶心。