13.【2016·四川】D

　　A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.

　　Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.

　　The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.

　　Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

　　Night milk quickened the start of sleep and caused the mice to sleep longer.

　　While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

　　Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

　　Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

【近三年高考（2017-2016）英语试题分项版解析：专题15 社会生活、说理议论类（原卷版）】相关文章：

★ 2017年高考英语二轮复习精品资料：专题15 完形填空（押题专练）（原卷版）

★ 2017年高考英语二轮复习精品资料：专题16 书面表达（押题专练）（原卷版）

★ 2017年高考英语二轮复习精品资料：专题14 阅读理解（教学案）（原卷版）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题11 青少年成长话题指导（教师版）

★ 2017年高考英语二轮复习精品资料：专题14 阅读理解（押题专练）（原卷版）

★ 2014届高考英语一轮复习必修1参考答案（外研版）

★ 2017年高考英语二轮复习精品资料：专题16 书面表达（教学案）（教师版）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题05 环境保护话题指导（学生版）

★ 2014届高考英语一轮复习课时作业(八)必修2Module 2《No Drugs》（外研版）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（17）及答案