In the past people suffered (1) ________ a disease called scurvy. Their gums bled, their skin became rough, their wounds did not (2) ________ and their muscles wasted away. The (3) ________ of these symptoms was a lack of vitamin C; people ate preserved meats and foods and could not get fresh vegetables and fruits.
The best (4) ________ of vitamin C are oranges, lemons, grapefruit, cantaloupes, strawberries, and fresh vegetables. These fruits must be fresh because vitamin C is destroyed by heat, storage, or exposure (5) ________ air.
Although today more people (6) ________ vitamin C pills than any other supplement, some people still have scurvy, (7)________ some of the elderly, alcoholics, and the chronically ill.
Research shows that vitamin C reduces the (8) ________ of colds and can help prevent cancer. There is also evidence that vitamin C prevents heart disease, (9) ________ wound healing, helps prevent gum disease, and helps protect us from pollutants such as cigarette smoke. Some recent research also shows that vitamin C has a positive effect on some mental (10)________ and increases life span.
đang được dịch, vui lòng đợi..
![](//viimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)