VOA慢速英语 维他命:维持健康的保障

　　VOICE ONE:

　　Funk was not able to separate the anti-berberi substance from the rice hulls; it was later shown to be thiamine. Other studies found that not all vitamines were amines. So the name was shortened to vitamin. But Funk was correct in recognizing their importance.

　　Scientists have discovered fourteen kinds of vitamins. They are known as vitamins A, the B group, C, D, E and K. Scientists say vitamins help to carry out chemical changes within cells. If we do not get enough of the vitamins we need in our food, we are at risk of developing a number of diseases.

　　VOICE TWO:

　　This brings us back to Casimir Funk. His studies of rice were part of a long search for foods that could cure disease.

　　One of the first people involved in that search was James Lind of Scotland. In the seventeen-forties, Lind was a doctor for the British Navy. He was investigating a problem that had existed in the Navy for many years.

　　The problem was the disease scurvy. So many sailors had scurvy that the Navy's fighting strength was very low. The sailors were weak from bleeding inside their bodies. Even the smallest wound would not heal. Doctor Lind thought the sailors were getting sick because they failed to eat some kinds of foods when they were at sea for many months.

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