普特聽力文摘《過量補充維他命有害嗎》

普特聽力是被公認的一種適合英語學習者的英語聽力材料，經常聽普特英語聽力，有助於學生的英語聽力提高。下面，小編為大家送上一篇普特英語聽力文摘，希望對大家有用。

　普特聽力文摘：

Do you take your vitamins everyday? Be careful. Just as vitamin deficiency can make you sick, so can vitamin toxicity. Indeed, vitamins can be very dangerous if you take them in high quantities.

What “A” And “D” Have In Common

Though vitamins A and D are the most likely to make you sick if you take too much of them, they aren’t the only vitamins that can be dangerous. All vitamins have the potential to be toxic if you ingest too much of them.

Part of the reason why A and D put you at higher risk than Vitamin C and others has to do with the way vitamins are dissolved. Vitamin C dissolves in water. Thus, if you take excess Vitamin C, your body can flush it out through urine. Vitamins A and D, however, dissolve in oils and melted fat.

The Consequences

So, when you take too much of one of these vitamins, rather than flushing the excess out, the body stores the surplus in fat or in fatty tissues such as the liver and the brain.

Accumulation of water in the brain, severe headaches, and birth defects are just three of the problems toxic levels of Vitamin A can cause. If you keep a relatively well-balanced diet, you’ll most likely get the vitamins your body needs without the use of supplements.

　參考譯文：

你每天都補充維他命麼?小心點。就如缺乏維他命會使你生病一樣，維他命中毒也會令你生病。事實上，如果攝入劑量太大，維他命會變得非常危險。

維他命A和維他命D的共同點。

儘管維他命A和維他命D是最有可能因為服用過量導致生病的，但是它們不是僅有的兩種會造成危險的維他命。如果你服用劑量過高，所有的維他命都有成為毒藥的可能。

服用維他命A和維他命D比維他命C以及其他維他命存在更高風險的部分原因在於維他命的分解方式。維他命C溶於水，因此，如果你服用了過量的.維他命C，你的身體可以通過尿液將其排出體外。而維他命A和維他命D卻是溶於油和脂肪的。

後果

因此，如果你過量攝入這幾種維生素的話，身體會將剩餘部分存入脂肪或脂肪組織，比如肝臟和大腦，而不會排出體外。

腦積水、嚴重的頭痛和先天畸形僅僅是維他命A中毒會造成的眾多疾病中的幾種。如果你保持飲食均衡，那麼你也許已經攝取了身體所需的維他命，不需要補充。