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An expert panel is poised to set new recommendations on how much vitamin D we need.
Aug. 5, 2009 | 5:48 p.m. EDT
Quick quiz: What vital nutrient may protect against , , , , and a host of other diseases? Experts on vitamin D are quick to answer, and, by their reckoning, many Americans are sorely lacking in the nutrient. Just this week, new data from a government-run health and
survey found that most kids weren't getting enough vitamin D and that those with the lowest levels were more likely to have high blood pressure, high blood sugar, and low levels of &good& HDL cholesterol. At a meeting convened Tuesday by the Institute of Medicine, leading vitamin D researchers mentioned this study and many others as they tried to convince an IOM committee to raise the daily recommended intake (DRI) for the nutrient.[]&When [the U.S. government] set the DRI in 1997, the amount of vitamin D recommended was based on the prevention of rickets,& said Robert Heaney of
in Omaha. Rickets, a bone malformation condition, has long been linked to severe vitamin D deficiency, as Heaney knows from studying the effects of the vitamin on bones. Vitamin D-fortified milk now gives most people protection from rickets, but we may not be getting enough of the nutrient to benefit from its protective effects against cancer, stroke, and other diseases. Experts like Heaney consider the current recommendations—200 international units for children and adults up to age 50, 400 IUs for ages 50 to 70, and 600 IUs for those 70 and older—to be way too low to help us stay healthy. In fact, they say, most Americans are deficient, especially during the winter, when many Northerners don't get the exposure to the sun that lets their bodies make vitamin D.[]Hundreds of studies have shown that people with high levels of vitamin D in their blood have lower rates of diseases and a lower death rate. However, that doesn't prove—and there really aren't any clinical trials showing—that people can lower their risk of illness by taking a supplement to raise their vitamin D level. That's a critical gap in the evidence, said Barry Kramer, editor in chief of the Journal of the National Cancer Institute. He cautions that previous research had suggested that high levels of beta carotene were associated with lower rates of cancer, but when people took beta carotene supplements as part of a clinical trial, they were more likely—not less—to die from cancer.[]Clinical trials involving vitamin D have yielded only a few promising results. Older women who took a supplement containing 700 to 1,000 IUs a day wound up with fewer bone fractures and fewer falls, according to a review of the research conducted by the Agency for Healthcare Research and Quality. Research for other claims is lacking. For example, the Women's Health Initiative study found that breast cancer rates were unaffected when women took 400 IUs of vitamin D combined with a calcium supplement every day for seven years. And a study on pregnant women found that taking 1,200 IUs of vitamin D didn't help prevent a high blood pressure condition called preeclampsia.[]How much to take. The vitamin D researchers at this week's meeting countered that these clinical trials may have used supplements that didn't contain enough of the nutrient for patients to achieve an optimal blood level of vitamin D. Michael Holick, a researcher at , says that most adults probably need to take about 2,000 IUs a day and that kids probably need about 1,000 IUs. Although vitamin D can be toxic at high doses, the latest research suggests that kids and adults can take 5,000 IUs or more a day in supplement form without any ill effects. (Our skin can , but any excess we make gets broken down by the body and doesn't cause any harm.)[]After the IOM expert panel reviews the research, it most likely will raise the recommended levels of vitamin D, and that could mean more foods being fortified with D, says Bess Dawson-Hughes of . She has researched using vitamin D supplementation to prevents falls and fractures. When these new recommendations will be issued and what they will be, however, is still unknown.Related News:
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复方胃友片维U颠茄铝镁片 功效：—缓解胃肠痉挛性疼痛及胃酸过多引起的胃痛、胃灼热感（烧心）、反酸，也可用于慢性胃炎。
商品编号：1511031商品规格：48片
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有效期：24个月批准文号：国药准字H生产企业：山西临汾云鹏药业有限公司
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复方胃友片维U颠茄铝镁片
缓解胃肠痉挛性疼痛及胃酸过多引起不适。
密闭保存。
如果您发现信息不准确，
复方胃友片维U颠茄铝镁片说明书【通用名称】维U颠茄铝镁片 　
【英文名称】Vitamin U,Aluminium Hydroxide and MagnesiumTrisilicate Tablets 　　
【汉语拼音】WeiU,Dianqie LǔmeiPian 　　
【别称】复方胃友片
本品每片含维生素U50毫克，氢氧化铝123毫克，三硅酸镁53毫克，颠茄流浸膏2.6毫克，辅料为：淀粉、硬脂酸镁
本品为薄膜衣片，除去薄膜衣后呈白色；有维生素 U 的特臭
【作用类别】
本品为抗酸类非处方药药品。
【适应症】
用于缓解胃肠痉挛性疼痛，以及缓解胃酸过多引起的胃痛、胃灼热感（烧心）、反酸，也可用于慢性胃炎。
【用法和用量】口服。成人，一次1～2粒，一日3次。
【不良反应】
1.老年人长期应用会导致骨质疏松。 　　
2.少见眼痛、眼压升高、皮疹。 　　
3.肾功能不全患者长期应用可能会有铝蓄积中毒，出现精神症状。 　　
4.长期大剂量服用，可致严重便秘，粪石引起肠梗阻。
对本品过敏者禁用。前列腺肥大、青光眼患者禁用。阑尾炎或有类似症状者禁用。骨折患者禁用。
【注意事项】
1.本品连续使用不得超过7天，症状未缓解请咨询医师或药师。 　　
2.孕妇及哺乳期妇女应在医师指导下使用。 　　
3.高血压、心脏病、胃肠道阻塞性疾患、甲状腺机能亢进、溃疡性结肠炎、反流性食管炎、肾功能不全者慎用。 　　
4.低磷血症（如吸收不良综合征）患者不宜长期大剂量使用。 　　
5.儿童用量请咨询医师或药师。 　　
6.对本品过敏者禁用，过敏体质者慎用。 　　
7.当本品性状发生改变时禁用。 　　
8.儿童必须在成人监护下使用。 　　
9.请将此药品放在儿童不能接触的地方。 　　
10.如正在使用其他药品，使用本品前请咨询医师或药师。
【药物相互作用】
服用本品的同时应避免服用其它药物，因氢氧化铝能与其它药物结合而影响疗效。本品可减弱甲氧氯普胺、多潘立酮的作用，不宜同服。本品如需与西咪替丁等H2受体拮抗剂合用，至少需间隔1小时。本品与肠溶片同服，可使肠溶片加快溶解，不应同用。如正在服用其它药品，服用本品前请咨询医师或药师
【药理作用】
本品中维生素U可促进肉芽组织和黏膜再生；氢氧化铝与三硅酸镁为抗酸药，能中和过多的胃酸，以缓解胃痛及烧心等症状；颠茄流浸膏可抑制胃液分泌，解除平滑肌痉挛引起的疼痛。复方胃友片维U颠茄铝镁片图片细节
以上是：复方胃友片维U颠茄铝镁片价格和说明书，若有需求、疑问，请咨询在线客服，或拨我们客服热线：400-060-0002
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