For many of us, it is the rocket fuel that gets us going first thing in the morning.

But one expert has argued that to get the maximum effect of caffeine, it's better to hold on a few hours - because coffee is most effective if consumed between 9.30am and 11.30am.

Steven Miller, a neuroscientist from the Uniformed Services University of the Health Sciences in Maryland, says it is best to drink coffee when the body’s levels of the hormone cortisol are low because caffeine interacts with the hormone.

hormone:荷尔蒙      cortisol:皮质醇

He explained that people who drink coffee when their cortisol levels are high –namely, between 8am and 9am –develop a tolerance to caffeine, meaning it becomes less effective.

Cortisol controls the body clock and causes people to feel wide awake, The Telegraph reports. The body’s levels of the hormone are usually high just after a person wakes up but start to fall about an hour afterwards.

Mr Miller argues that it is during this drop in cortisol levels that people get the most benefit from the caffeine in coffee –it gives them a boost as it encourages cortisol production when their cortisol levels start to drop and they do not become resistant to its benefits.

He explained that cortisol levels also peak at lunchtime and between 5.30pm and 6.30pm, meaning that these would also not be good times to drink coffee.

Writing on his blog he said: ‘If we are drinking caffeine at a time when your cortisol concentration in the blood is at its peak, you probably should not be drinking it.

‘This is because cortisol production is strongly related to your level of alertness and cortisol peaks for your 24 hour rhythm between 8 and 9am on average.

alertness:警戒,机敏

He added that people who drink a coffee first thing in the morning, when their cortisol levels are naturally high, will soon find themselves needing to make their coffee stronger and stronger to get the desired effect.

However, he did accept that cortisol levels at different times of day vary from person to person meaning that the best time of day to drink a coffee also differs between people.

For example, people who get up very early may find their cortisol levels drop earlier than those of people who get up late.

He says it helps turn energy into sugar to be utilised by cells in the body and that it also plays a role in controlling the body clock.

每日英语:The best time for coffee is 10:30 a.m.的更多相关文章

  1. 每日英语:South India's Streetside Coffee Culture

    Early one morning last week I queued outside Sri Gopi Iyengar Coffee and Tiffin Center, a coffee bar ...

  2. 每日英语:Got 5 Minutes? 'Flash Fiction' Catches On

    Chinese author Lao Ma has a simple approach to his short stories: In the face of life, everything is ...

  3. 每日英语:Surviving a Conference Call

    The conference call is one of the most familiar rituals of office life -- and one of the most hated. ...

  4. 每日英语:15 places to find inspiration

    If you’re a writer or artist, you understand the power of location when it comes to creativity and f ...

  5. 每日英语:Tech Firms Flock to Vietnam

    Opening up a Korean restaurant among the rice fields and limestone karsts north of Hanoi might seem ...

  6. 每日英语:Secrets Of Effective Office Humor

    Margot Carmichael Lester loves making good-natured jokes at work. As owner of The Word Factory, a Ca ...

  7. 每日英语:A Better Way To Treat Anxiety

    Getting up the nerve to order in a coffee shop used to be difficult for 16-year-old Georgiann Steely ...

  8. 每日英语:The Secret About Online Ad Traffic: One-Third Is Bogus

    Billions of dollars are flowing into online advertising. But marketers also are confronting an uncom ...

  9. 每日英语:A Different Color: China's Chameleonic Politics

    China has tried your form of government and found it wanting. That was the message delivered by Chin ...

随机推荐

  1. Java之——Web项目中DLL文件动态加载方法

    本文转自:https://blog.csdn.net/l1028386804/article/details/53903557 在Java Web项目中,我们经常会用到通过JNI调用dll动态库文件来 ...

  2. Debug 路漫漫-05

    Debug 路漫漫-05: 1.使用这种方式计算 AUC 指标,结果出来居然是 NAN, —— 分母为(M*N),M或者N必有一个为0 了.(nan出现的情况绝大部分是分母出现0了)   若分子为0的 ...

  3. 【MongoDB】MongoDB的安装教程

    1,MongoDB简介 MongoDB也是一种数据库,只不过它既不是关系型数据库,也不是非关系型数据库(NoSQL),而是一种介于关系型数据库和NoSQL之间的一种数据库.如果说非关系型数据库是轻量级 ...

  4. 【java】详解集合

    目录结构: contents structure [-] 集合概述 什么是集合 Collection和Map的区别 List和Set的区别 ArrayList和LinkedList的区别 HashSe ...

  5. CGRectMake 延伸

    判断给定的点是否被一个CGRect包含,可以用CGRectContainsPoint函数 BOOLcontains=CGRectContainsPoint(CGRectrect,CGPointpoin ...

  6. sqlserver 2008 开启CLR

    Common language runtime (CLR) 特性支持在sql server中编写和执行.net的存储过程.触发器.和函数但是要想执行CLR代码,首先要开启CLR特性 1.查看CLR特性 ...

  7. rdlc 分页操作和分页统计

    1. 工具箱中拖一个列表过来,设置 列表-->行组-->组属性常规-->组表达式=Int((RowNumber(Nothing)-1)/10)分页符-->勾选在组的结尾. 2. ...

  8. webpack 4.0的一些小坑

    一.需要指定开发模式还是生产模式,需要改动两个地方: 1.package.json 中加入 --mode development "scripts": { "dev&qu ...

  9. 转: springboot2.0下hystrix.stream 404

    springboot2.0下hystrix dashboard Unable to connect to Command Metric Stream解决办法https://blog.csdn.net/ ...

  10. python2 与 python3的区别总结

    python2 与 python3的区别总结    几乎所有的Python 2程序都需要一些修改才能正常地运行在Python 3的环境下.为了简化这个转换过程,Python 3自带了一个叫做2to3的 ...