回复: zt: 关于维生素C
In two thousand six, medical experts gathered near Washington, D.C., to discuss the latest research on vitamin supplements. The experts found little evidence that most supplements do anything to protect or improve health. But they noted that some do help to prevent disease.
The medical experts agreed with doctors who say that people who know they lack a vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. That is because, as people get older, the body loses its ability to take it from foods.
The experts also noted that taking too much of some vitamins can be harmful. They said people should be sure to discuss what vitamins they take with their doctors. This is because some vitamins can cause harmful effects when mixed with medicines.