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zoom RSS 脳の発達を促すというジューシーなジュース

<<   作成日時 : 2009/04/26 22:26   >>

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 脳の発達を促すというジューシーなジュースは本当に効果があるか?
画像 ネッスルの製品は栄養分DHAを含んでいるけれども、その利点には疑問がある。
 最近は幼児が外出するときにジュースボックスなしではすまされない。たくさん果物を食べるわけではない子どもに与えるフルーツジュースが糖とカロリーが負荷されさらに、ビタミンとミネラルも加えられている。ネッスルは最近、脳力を高める目的でDHA(ドコサヘキサエン酸)を含んだ新しいジュースを販売開始した。いる。
 脂肪分が多い魚の中で自然に発見されたオメガ3脂肪酸の一つであるDHAは脳細胞の膜と目の網膜を築くことに役立っている。多くの米国人が魚をあまり食べない傾向にあり、脳がDHA不足に苦しんでいるかもしれない。
 食品会社は、栄養分をパスタ料理、卵、バター代用品、および他の製品に追加することによって対応している。DHAはまた一般的に育児食と粉ミルクに追加されている。
 脳と発達ジューシージュースJuicy Juice Brain Developmentには、ブドウとりんごがあり、食料雑貨店で手に入る。1リットル約3ドルで、4オンスにつき16ミリグラムのツナオイルから取ったDHAを含んでいる。100%子どものための100%ジュースと違い、糖とカロリーを下げるために30%水で薄めている。名前は別として、ネッスルは頭を良くするとは言っていない。
 ジューシージュースのウェブサイトには、「重大な脳発達は6ヶ月から2歳の間で起こり、ジューシー・ジュース脳発達フルーツジュース飲み物はこの早い年令層のために特別に作成された」と言っている小児科医でコンサルタントとして雇われた Dr. Yinka Daviesからの言葉をのせている。
 ブリティッシュ・コロンビア大学のSheila Innisは、DHAは重要な栄養分であるかもしれないけれども、全然魔法の脳ブースターではないと言う。多くの魚を食べない子どもにとっては有益かもしれない。
 2007年のjournal Early Human Developmentに掲載された研究は、母乳・粉ミルク・DHAとARA(オメガ6脂肪酸)を追加した粉ミルクを投与された84人の子どもの4歳時点でのIQは、母乳とDHA・ARA添加粉ミルクの群で高かった。
 2001年の研究で、64人の6-12才のADHD児にDHA345mgを毎日4ヶ月間投与したが、症状改善はなかった。
 16mgのDHAは一般のDHA強化製品に比べると少ないが、そもそも子どもの食事中のDHAの最適レベルはわかっていない。ネッスルのGood Start Supreme粉ミルクは1回あたり28mgのDHAを含んでいる。
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Does Brain Development Juicy Juice really work?
The Nestle product contains the nutrient DHA, but its benefits are questioned.
http://www.latimes.com/features/health/la-hew-skeptic21-2009apr21,0,7219443.story
By Chris Woolston
April 21, 2009
These days, toddlers and preschoolers rarely manage to get out the door without a juice box.

Though most fruit juice is loaded with sugar and calories, it also provides vitamins and minerals to kids who may not eat much real fruit. But could the younger set be getting even more through those pointy little straws? The Nestle' corporation recently introduced a new juice intended to boost brain power. Brain Development Juicy Juice contains DHA (docosahexaenoic acid), a nutrient that is often touted as a brain tonic for young and old alike.


DHA, a type of omega-3 fatty acid naturally found in fatty fish, helps build the membranes of brain cells and the retina of the eye. Because many Americans -- including the vast majority of children -- tend to skimp on fish, some researchers have speculated that our brains could be suffering from a shortfall of DHA. Food companies have responded by adding the nutrient to pastas, eggs, butter substitutes and other products. DHA is also commonly added to baby foods and formulas.

Juicy Juice Brain Development, available in grape and apple, is sold in Target and major grocery stores. You can buy a one-liter (34-fluid-ounce) carton for about $3. Each 4-ounce serving contains 16 milligrams of DHA extracted from tuna oil. Unlike regular Juicy Juice -- billed as "100 percent juice for 100 percent kids" -- the brain development variety is 30% water, making it lower in sugar and calories.

The claims: Aside from the name of the product, Nestle' doesn't explicitly claim that Juicy Juice Brain Development will make a child any brainier. The Juicy Juice website does include a statement from pediatrician and paid consultant Dr. Yinka Davies saying that "critical brain development takes place between 6 months to 2 years old, and Juicy Juice Brain Development Fruit Juice Beverage is specially formulated for this early age group." No one from Nestle' was available for an interview last week, but the company provided a statement saying that "DHA is recognized to be a building block specifically for brain development during the early years of life, and we're excited to be able to offer it."

The bottom line: DHA may be an important nutrient, but it's no magic brain booster, says Sheila Innis, director of the nutrition research program at the University of British Columbia in Vancouver. Innis is the author or co-author of more than 50 journal articles on DHA.

"It's plausible that products like this could be useful in children that don't eat much fish," Innis says, though she wouldn't speculate on what the benefits might be. It's unlikely that juice alone could significantly improve a child's thinking or behavior, she says. That's because many factors help shape a child's brain development and thinking skills, and it's overly simplistic to think that one nutrient will make a dramatic difference.

As Innis reported in the Journal of Nutrition in 2007, many studies have tried -- and failed -- to find evidence that adding DHA to infant formula can improve brain development. A few studies have pointed to potential benefits, though. A 2007 study published in the journal Early Human Development followed 84 infants who were fed either breast milk, regular formula or formula with added DHA and ARA (an omega-6 fatty acid). As 4-year-olds, the breast-fed kids and the DHA- and ARA-fortified kids scored higher than the other kids in IQ and vision tests.

Researchers have also checked to see whether large doses of DHA could treat behavioral problems in older kids. A 2001 study of 63 6- to 12-year-olds with attention-deficit/hyperactivity disorder found that taking 345 milligrams of DHA -- about as much DHA as found in three liters of the new Juicy Juice -- every day for four months didn't improve their ADHD symptoms.

If parents decide that they'd like their children to have more DHA, fortified juice can be a good way to go, says Keli Hawthorne, a registered dietitian with the Children's Nutrition Research Center at Baylor College of Medicine in Houston. Hawthorne was the lead author of a 2009 study showing that kids who drank DHA-fortified orange juice ended up with more DHA in their bloodstreams. Hawthorne notes that getting kids to drink juice can be much easier than putting them on a steady diet of fish. (Fish sticks don't count, she says, because they are usually low in DHA.)

Hawthorne and colleagues added at least 50 milligrams of DHA in each serving of juice, far more than the 16 milligrams found in a serving of Juicy Juice Brain Development. Nobody knows the optimal level of DHA in a child's diet, but Hawthorne says that the levels in Juicy Juice seem small, especially when compared with other DHA-fortified products on the market. Nestle''s Good Start Supreme baby formula contains 28 milligrams of DHA per serving, for example.

In its statement, Nestle' said it "worked closely with clinicians, nutritionists, dietitians and regulatory experts to determine the DHA dosage" in Juicy Juice Brain Development.

Is there a consumer product you'd like the Healthy Skeptic to examine? E-mail health@latimes.com. Read more at latimes.com/skeptic.

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