不同配方的奶粉对婴儿体重影响各异-凯发k8官网

不同配方的奶粉对婴儿体重影响各异
文章来源:未知 文章作者:enread 发布时间:2010-12-29 03:24 字体: [ ] 
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new findings from the monell center reveal that weight gain of formula-fed infants is influenced by the type of formula the infant is consuming. the findings have implications related to the infant's risk for the development of 1, 2 and other diseases later in life. "events early in life have long-term consequences on health and one of the most significant influences is early growth rate," said study lead author julie mennella, ph.d., a developmental psychobiologist at monell. "we already know that formula-fed babies gain more weight than breast-fed babies. but we didn't know whether this was true for all types of formula."

while most infant formulas are cow's milk-based, other choices include soy-based and protein hydrolysate(水解物) -based formulas. protein hydrolysate formulas contain pre-digested proteins and typically are fed to infants who cannot tolerate the intact(完整的,原封不动的) proteins in other formulas.

in adults, pre-digested proteins are believed to act in the 3(肠) to 4(创始,发起) the end of a meal, thus leading to smaller meals and 5 of fewer calories. based on this, the authors hypothesized that infants who were feeding protein hydrolysate formulas would eat less and have an altered growth pattern relative to infants feeding cow's milk-based formula.

in the study, published online in the journal pediatrics, infants whose parents had already 6 to bottle-feed were 7 assigned at two weeks of age to feed either a cow's milk-based formula (35 infants) or a protein hydrolysate formula (24 infants) for seven months.

both formulas contained the same amount of calories, but the hydrolysate formula had more protein, including greater amounts of small peptides(多肽类,缩氨酸) and free amino acids.

infants were weighed once each month in the laboratory, where they also were videotaped consuming a meal of the assigned formula. the meal continued until the infant signaled that s/he was full.

over the seven months of the study, the protein hydrolysate infants gained weight at a slower rate than infants fed cow milk formula. linear growth, or length, did not differ between the two groups, demonstrating that the differences in growth were specifically attributable to weight.

"all formulas are not alike," said mennella. "these two formulas have the same amount of calories, but differ 8 in terms of how they influence infant growth."

when the data were compared to national norms for breast-fed infants, the rate of weight gain of protein hydrolysate infants was comparable to the breast milk standards; in contrast, infants fed cow's milk formula gained weight at a greater rate than the same breast milk standards.

analysis of the laboratory meal revealed the infants fed the protein hydrolysate formula consumed less formula during the meal.

"one of the reasons the protein hydrolysate infants had similar growth patterns to breast-fed infants, who are the gold standard, is that they consumed less formula during a feed as compared to infants fed cow's milk formula" said mennella. "the next question to ask is: why do infants on cow's milk formula overfeed?"

the findings highlight the need to understand the long-term influences of infant formula composition on feeding behavior, growth, and 9 health. future studies will 10 measures of energy 11 and 12(支出,花费) to examine how the individual formulas influence growth, and how each differs from breastfeeding.



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1 dv1ya     
n.肥胖,肥大
参考例句:
  • one effect of overeating may be obesity.吃得过多能导致肥胖。
  • sugar and fat can more easily lead to obesity than some other foods.糖和脂肪比其他食物更容易导致肥胖。
2 upnzu     
n.糖尿病
参考例句:
  • in case of diabetes, physicians advise against the use of sugar.对于糖尿病患者,医生告诫他们不要吃糖。
  • diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。
3 rbpzy     
adj.内部的;国内的;n.肠
参考例句:
  • this vitamin is absorbed through the walls of the small intestine.这种维生素通过小肠壁被吸收。
  • the service productivity is the function,including external efficiency,intestine efficiency and capacity efficiency.服务业的生产率是一个包含有外部效率、内部效率和能力效率的函数。
4 z6hxz     
vt.开始,创始,发动;启蒙,使入门;引入
参考例句:
  • a language teacher should initiate pupils into the elements of grammar.语言老师应该把基本语法教给学生。
  • they wanted to initiate a discussion on economics.他们想启动一次经济学讨论。
5 44cyq     
n.吸入,纳入;进气口,入口
参考例句:
  • reduce your salt intake.减少盐的摄入量。
  • there was a horrified intake of breath from every child.所有的孩子都害怕地倒抽了一口凉气。
6 lvqzzd     
adj.决定了的,坚决的;明显的,明确的
参考例句:
  • this gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • there is a decided difference between british and chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
7 cktzbm     
adv.随便地,未加计划地
参考例句:
  • within the hot gas chamber, molecules are moving randomly in all directions. 在灼热的气体燃烧室内,分子在各个方向上作无规运动。 来自辞典例句
  • transformed cells are loosely attached, rounded and randomly oriented. 转化细胞则不大贴壁、圆缩并呈杂乱分布。 来自辞典例句
8 0ywyq     
adv.极大地;相当大地;在很大程度上
参考例句:
  • the economic situation has changed considerably.经济形势已发生了相当大的变化。
  • the gap has narrowed considerably.分歧大大缩小了。
9 2r4z1     
adj.新陈代谢的
参考例句:
  • impressive metabolic alternations have been undergone during embryogenesis.在胚胎发生期间经历了深刻的代谢变化。
  • a number of intoxicants are associated with metabolic acidosis.许多毒性物质可引起代谢性酸中毒。
10 oipwz     
vt.使用,利用
参考例句:
  • the cook will utilize the leftover ham bone to make soup.厨师要用吃剩的猪腿骨做汤。
  • you must utilize all available resources.你必须利用一切可以得到的资源。
11 171zc     
n.新陈代谢
参考例句:
  • after years of dieting,carol's metabolism was completely out of whack.经过数年的节食,卡罗尔的新陈代谢完全紊乱了。
  • all living matter undergoes a process of metabolism.生物都有新陈代谢。
12 xpbzm     
n.(时间、劳力、金钱等)支出;使用,消耗
参考例句:
  • the entry of all expenditure is necessary.有必要把一切开支入账。
  • the monthly expenditure of our family is four hundred dollars altogether.我们一家的开销每月共计四百元。
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