首页
登录
职称英语
For years, doctors advised their patients that the only thing taking multivi
For years, doctors advised their patients that the only thing taking multivi
游客
2025-04-08
26
管理
问题
For years, doctors advised their patients that the only thing taking multivitamins does is give them extensive urine(尿). After all, true vitamin deficiencies are practically unheard of in industrialized countries. Now it seems that those doctors may have been wrong. The results of a growing number of studies suggest that even a modest vitamin shortfall can be harmful to your health. Although proof of the benefits of multivitamins is still far from certain, the few dollars you spend on them is probably a good investment.
Or at least that’s the argument put forward in the New England Journal of Medicine. Ideally, said Dr. Walter Willett and Dr. Meir Stampfer of Harvard, all vitamin supplements would be evaluated in scientifically rigorous clinical trials. But those studies can take a long time and often raise more questions than they answer. At some point, while researchers work on figuring out where the truth lies, it just makes sense to say the potential benefit outweighs the cost.
The best evidence to date concerns folate(叶酸), one of the B vitamins. It’s been proved to limit the number of defects in embryos(胚胎), and a recent trial found that folate in combination with vitamin B12 and a form of B6 also decreases the re-blockage of arteries after surgical repair.
The news on vitamin E has been more mixed. Healthy folks who take 400 international units daily for at least two years appear somewhat less likely to develop heart disease. But when doctors give vitamin E to patients who already have heart disease, the vitamin doesn’t seem to help. It may turn out that vitamin E plays a role in prevention but cannot undo serious damage.
Despite vitamin C’s great popularity, consuming large amounts of it still has not been positively linked to any great benefit. The body quickly becomes saturated with C and simply excretes(排泄)any excess.
The multivitamins question boils down to this: Do you need to wait until all the evidence is in before you take them, or are you willing to accept that there’s enough evidence that they don’t hurt and could help?
If the latter, there’s no need to go to extremes and buy the biggest horse pills or the most expensive bottles. Large doses can cause trouble, including excessive bleeding and nervous system problems.
Multivitamins are no substitute for exercise and a balanced diet, of course. As long as you understand that any potential benefit is modest and subject to further refinement, taking a daily multivitamin makes a lot of sense. [br] According to the author, clinical trials of vitamin supplements______.
选项
A、often result in misleading conclusions
B、take time and will not produce conclusive results
C、should be conducted by scientists on a larger scale
D、appear to be a sheer waste of time and resources
答案
B
解析
事实细节题。文章第二段提及所有的维生素供应都会在实验的基础上进行科学的评估,之后第三段提及But those studies can take a long time and often raise more questions than they answer,选项B与此信息一致。故答案为B。
转载请注明原文地址:http://tihaiku.com/zcyy/4032387.html
相关试题推荐
A、declareB、recommendC、adviseD、contendBdeclare意为“公开宣布”;recommend意为“正式建议或推荐”;a
Doctorshavelongknownthatlungcancer,whichkills160,000Americanseach
Doctorshavelongknownthatlungcancer,whichkills160,000Americanseach
It’sveryinterestingtonotewherethedebateaboutdiversity(多样化)istaking
It’sveryinterestingtonotewherethedebateaboutdiversity(多样化)istaking
It’sveryinterestingtonotewherethedebateaboutdiversity(多样化)istaking
It’sveryinterestingtonotewherethedebateaboutdiversity(多样化)istaking
TheWorldBankistakingstepsto_____itslendingtoreducingpovertyintheThi
Julietisnotatwork.Sheistakinga_____untiltheendofthisweek.A、vocation
Asasalesman,heworksona____basis,taking10%ofeverythinghesells.A、reven
随机试题
YorkHouse
Theygotooneoftheworld’smostprestigiousuniversitiesandpridethemse
( )属于评标依据。A.招标文件 B.企业法人营业执照复印件 C.公司业绩
患者,男,11岁,下颌面部呈相对后退位,口唇闭合呈现口唇肌肉紧张,覆5mm,覆盖
一民工在工地干活,踩到一生锈铁钉,刺破右足,来院就诊。见伤口血已自止,边缘略肿胀
患者,男,20岁。胃痛暴作,疼痛较剧,喜热敷,口不渴,舌苔薄白,脉弦紧。治疗应首
A.蓼科B.毛茛科C.石竹科D.苋科E.防己科川牛膝来源于()。
一位哲人说过:“单凭观察所得的经验,是决不能充分证明必然性的。这是如此正确,以致
预算资金的监督制衡方最基本的行为特征是()。A.代表人民的利益 B.具有委员
某租出设备价格50万元,租期为5年,折现率8%,附加率4%,采用附加率法计算租金
最新回复
(
0
)