| 樓主: |
cwcmuscle(BIGONE)(
 ) |
2010/06/23 14:45:56 |
221.120.67.xxx |
|
來自 台北市
磅數 201.7磅
發文 48
註冊 2006/7/25
量級 輕中量級
★★☆
|
http://www.24drs.com/webmd/chinese_t.asp?who=091e9c5e805b11e5
消費者報告研究發現，鉛、鎘與其他金屬的含量令人擔心。
【24drs.com】June 3, 2010 – 根據消費者報導(Consumer Reports)的一篇研究，受青少年、天天健身者、嬰兒潮世代和孕婦歡迎的蛋白質飲料，如Muscle Milk和EAS Myoplex，可能有不安全的重金屬含量與其他有害物質。
消費者報導之該篇研究的編輯Andrea Rock表示，在一般情況下消費這些蛋白質飲料，即便是低量，在某些人可能會產生慢性曝露於有健康問題的重金屬如鎘和鉛的風險，特別是有風險的人。她表示，有風險的人包括18歲以下者、孕婦、糖尿病或慢性腎臟狀況。
蛋白質飲料製造商並不同意，表示研究有瑕疵。
Rock表示，蛋白質飲料雖然有其便利性，多數人可以藉由飲食符合蛋白質需求，這樣對您的健康和荷包都比較好。
完整的報告即將登載於7月的消費者報導(Consumer Reports)。
【對蛋白質飲料進行的實驗室檢測】
為了該研究，消費者報導在一個獨立實驗室檢測15種蛋白質飲料，包括即開即飲的配方以及須和牛奶、果汁或水混合的粉末。這些產品檢測的3份份量分別含有27-180 克的蛋白質。
檢測污染物(砷、鎘、鉛與汞)發現，多數產品處於低到中度範圍。但是，Rock表示，有3種產品引起顧慮、超過美國藥典(U.S. Pharmacopeia，USP)核准的上限；USP為健康產品設定自願性標準。
過量的鎘會累積在腎臟中，過量的蛋白質也會傷害腎臟。
根據該報告，蛋白質飲料被視為飲食補充品，所以製造商在販售之前不需要先檢測產品確保其安全性和有效性。
消費者報導表示，這3種特別考量的產品是：
* EAS Myoplex Original Rich Dark Chocolate Shake，每3份平均含有16.9 mg的砷—超過USP提出的每天15 mg界線。它每3份平均含有5.1 mg的鎘 -- 超過USP提出的每天5 mg。
* Muscle Milk的巧克力粉，每3份含有這4種金屬，檢測的15項產品中，有3種的含量最高。鎘含量為5.6 mg--超過5 mg這個界線，鉛有13.5 mg-- 超過USP提出的10 mg界線。砷平均有12.2 mg – 接近USP提出的每天15mg界線。
* Muscle Milk的香草奶，每3份含有12.2 mg鉛--超過每天10 mg的界線，它有11.2 mg的砷 -- 接近每天15mg的界線。
Rock發現，其中只有一種產品Six Star Muscle Professional Strength Whey Protein，具體說明每天最大攝食量，研究者表示，其他製造商為了促銷而說明籠統。
【業界回應】
根據Muscle Milk製造商CytoSport之發起人Greg Pickett的聲明，業界基於一些理由反對該報告，報告中檢測的物質在自然中也存在，在任何農產品如乳製品、蔬果中，往往都會發現有微量存在。
Pickett在該聲明中指出，消費者報導所說的含有高量污染物的兩種Muscle Milk產品，都曾由NSF International這個檢測產品標準的獨立機構分析，且都有通過。
製造Myoplex protein shakes之Abbott Nutrition的發言人Michelle L. Zendah提出以下聲明：在我們的Myoplex protein shakes中，鎘和砷值並沒有安全風險。我們的品質檢測顯示，這些元素的量低於所有現行的安全標準，包括美國環保署(EPA)和世界衛生組織(WHO)的標準，消費者可以有信心繼續使用Myoplex shakes產品。
【一名營養專家的看法】
美國糖尿病協會發言人Jeannie Gazzaniga-Moloo博士表示，蛋白質在飲食中很重要，但是你不需要藉由喝蛋白質飲料來獲得。
她建議，主要需藉由天然食物來源。不要過度依賴這些蛋白質飲料作為你的主要蛋白質來源，應藉由乳製品、肉、豆、和一些全穀類來獲得蛋白質。
根據消費者報導，轉向食物而非蛋白質飲料，對於您的健康和荷包都比較好。
研究者表示，粗略估計你每天所需蛋白質量的方法是，將你的體重乘以0.4，運動員一般則是建議每天每磅體重攝取1克的蛋白質。所以，一個120磅的人一般需要約48克、180磅者需要72克。根據政府調查，多數美國人超過，每天攝取達82克。
好的蛋白質來源包括半份雞胸(27克)、3份炒蛋(20克)或3杯8盎司的牛奶(23克)。對照的話，一杓的Nitro-Tech 粉末有25克。
出處: WebMD Health News
作者: Kathleen Doheny
審閱: Laura Martin
http://www.webmd.com/food-recipes/news/20100603/report-protein-drinks-have-unhealthy-metals
Report: Protein Drinks Have Unhealthy Metals
Consumer Reports Study Finds Worrisome Levels of Lead, Cadmium, and Other Metals
By Kathleen Doheny
Reviewed by Laura J. Martin
WebMD Health News
MDJune 3, 2010 -- Popular protein drinks with names like Muscle Milk and EAS Myoplex -- favorites of teens, gym rats, boomers, and pregnant women -- can contain potentially unsafe levels of heavy metals and other harmful substances, according to an investigation by Consumer Reports.
''Consuming these kinds of protein drinks on a regular basis can in some cases create the risk of chronic exposure, even at low levels, to heavy metals such as cadmium and lead that can pose health problems, particularly to vulnerable people," says Andrea Rock, the Consumer Reports editor for the investigation. Among vulnerable people are children under age 18, pregnant women, and people with diabetes or chronic kidney conditions, she says.
Makers of protein drinks disagreed and said there were flaws in the investigation.
While the protein drinks are marketed as convenient, Rock says, "Most people can meet their protein needs through diet. And that can be better for both your health and your wallet.''
The full report will be in the July issue of Consumer Reports.
Lab Tests on Protein Drinks
For the study, Consumer Reports had an independent laboratory test 15 protein drinks, including ready-to-drink formulas and powders meant to be mixed with milk, juice, or water. Three servings of the products tested provide from 27 to180 grams of protein.
Testing for contaminants -- including arsenic, cadmium, lead, and mercury -- found most products to be in the low to moderate range. But three products cause concern, Rock says, because people who have three servings a day could be exposed to higher levels of three substances -- arsenic, cadmium and lead. Some products surpass the maximum limit proposed by the U.S. Pharmacopeia (USP). The USP sets voluntary standards for health products.
Excess cadmium can accumulate and gather in the kidneys, and excess protein can also damage the kidneys.
Protein drinks are considered dietary supplements, so the makers are not required to test the products before sale to ensure they are safe and effective, according to the report.
Consumer Reports says these three products are of special concern:
*EAS Myoplex Original Rich Dark Chocolate Shake has an average of 16.9 micrograms of arsenic in three servings -- more than the 15 micrograms a day that is the proposed USP limit. It has an average of 5.1 micrograms of cadmium for three servings -- above the USP limit of 5 micrograms a day.
*Muscle Milk chocolate powder, at three servings, contained all four of the metals, and three metals were found at a level that was among the highest of all 15 products tested. Cadmium levels were 5.6 micrograms -- above the 5-microgram limit. Lead was 13.5 micrograms -- above the USP limit of 10 micrograms. The arsenic averaged 12.2 micrograms -- near the 15-microgram daily USP limit.
*Muscle Milk vanilla crème had 12.2 micrograms of lead per three servings -- above the 10-microgram daily limit. It has 11.2 micrograms of arsenic -- close to the 15-microgram daily limit.
Just one of the products, Six Star Muscle Professional Strength Whey Protein, specifies a maximum daily intake, Rock found. Other makers use vague language, the researchers say, which could promote high consumption levels.
Industry Response
The industry took exception to the report for a number of reasons. The substances tested in the report ''are naturally occurring in the environment," according to a statement issued by Greg Pickett, founder of CytoSport, which makes Muscle Milk. ''It would be uncommon, if not impossible, not to detect the trace amounts reportedly found in any agricultural product, such as dairy products, fruits and vegetables."
In the statement, Pickett notes that the two Muscle Milk products that Consumer Reports says have high levels of contaminants were both analyzed by NSF International, an independent organization that sets product standards, and found to pass.
Michelle L. Zendah, a spokeswoman for Abbott Nutrition, which makes Myoplex protein shakes, issued this statement: "There is no safety risk from the trace levels of cadmium and arsenic in our Myoplex protein shakes. Our quality testing shows the level of these elements is below all current, well-established safety standards, including those from the U.S. Environmental Protection Agency (EPA) and the World Health Organization (WHO). Consumers can continue to use Myoplex shakes with confidence."
A Nutrition Expert's Perspective
Protein is important in the diet, but you don’t need the protein drinks to get enough, says Jeannie Gazzaniga-Moloo, PhD, RD, a spokeswoman for the American Dietetic Association.
She recommends people turn to natural food sources primarily. "Don't rely on these [protein drinks] heavily to be your primary protein source in your diet. Look to dairy, meats, and beans and some whole grains to provide protein."
Turning to food rather than protein drinks is easier on your health and your wallet, according to Consumer Reports.
To get a rough idea of daily protein needs, the researchers say, multiply your body weight by 0.4. Athletes generally are advised to eat a gram of protein per pound of body weight daily.
So a 120-pound person in general would need about 48 grams and a 180-pound person would need 72 grams. Most Americans surpass that, getting 82 grams a day, according to government surveys.
Good sources of protein include half a chicken breast (27 grams), three scrambled eggs (20 grams), or three 8-ounce glasses of milk (23 grams). A scoop of Nitro-Tech powder, in comparison, has 25 grams.
|
|
顯示全部圖片1
顯示全部圖片2
回本版列表
版權所有 All Rights Reserved