A study announced on Feb. 16 indicates that taking Vitamin D supplements can prevent respiratory tract infections such as colds and influenza, reigniting the debate on the effectiveness of non-prescription dietary supplements.
The study, in the British medical publication BMJ, claims to have discovered, for the first time, “clear evidence” of a link between Vitamin D and influenza, after evaluating the different results from a total of 25 clinical trials in 14 countries.
This is especially apparent for people suffering from Vitamin D deficiency. Vitamin D can be absorbed through a number of foods. The human body is also able to synthesize Vitamin D endogenously when ultraviolet rays from sunlight make contact with the skin.
Many people have Vitamin D deficiency, especially residents of areas of climates of low levels of sunlight.
For many years, scientific studies have come up with mixed conclusions about Vitamin D, with some finding that low levels of Vitamin D can increase the risk of bone fracture, cardiovascular disease, colorectal cancer, diabetes, depression, Alzheimer’s disease and death. Other studies, however, showed that it was impossible to prove a link between Vitamin D and risk of disease.
(CNA, translated by Paul Cooper)
True or False 是非題
A) For some time, sporadic studies have demonstrated evidence of a link between Vitamin D and certain diseases.
1. clinical adj.
臨床 (lin2 chuang2)
2. deficiency n.
含量不足 (han2 liang4 bu4 zu2)
3. diabetes n.
糖尿病 (tang2 niao4 bing4)
4. depression n.
憂鬱症 (you1 yu4 zheng4)
B) The recent BMJ study has shown for the first time clear evidence of a link between Vitamin D and diseases such as cancer and Alzheimer’s.
C) As a result of this study, the medical establishment now believes that dietary supplements can cure the common cold.
D) Vitamin D can be found in some foods, but can also be produced by the human body.
Answers: A) T, B) F, C) F, D) T