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Home arrow Top Blog Articles arrow Coffee Articles arrow Coffee has secret trick to stop sleep
Coffee has secret trick to stop sleep PDF Print E-mail
Written by c0ff33   
Jan 26, 2016 at 09:15 AM


A cup of coffee in the evening may be keeping you awake for more reasons than you realise, scientists say.

Their study, in Science Translation Medicine, showed caffeine was more than just a stimulant and actually slowed down the body's internal clock.

A double espresso three hours before bedtime delayed the production of the sleep hormone melatonin by about 40 minutes, making it harder to nod off.

Experts said our own actions had a huge influence on sleep and the body clock.

One of the researchers, Dr John O'Neill, from the Medical Research Council's Laboratory of Molecular Biology in Cambridge, told the BBC News website: "If you're tired and having a coffee at night to stay awake, then that is a bad idea, you'll find it harder to go to sleep and get enough sleep."

In his half of the study, cells grown in a dish were exposed to caffeine to work out how it changed their ability to keep time.

It showed the drug was able to alter the chemical clocks ticking away in every cell of the human body.

Wakey wakey

Meanwhile, five people at the University of Colorado Boulder, in the US, were locked in a sleep laboratory for 50 days.

And as light exposure is the main way we normally control our body clock, they spent most of their incarceration in very dim light.

In a series of experiments over the month and a half, the scientists showed that an evening dose of caffeine slowed the body clock by 40 minutes.

It had roughly half the impact of three hours of bright light at bedtime.
Dr O'Neill said it would be "complete speculation" to set a cut-off time for drinking caffeine in the evening but he personally never drank coffee after 17:00.

He said the findings may help treat some sleep disorders and people who naturally woke up too early - known as larks - to help keep them in sync with the rest of the world.

"It could be useful with jet lag if you are flying east to west where taking caffeine at the right time of day might speed up the time it takes to overcome jet lag," he added.

Prof Derk-Jan Dijk, from the University of Surrey, told the BBC: "Individuals differ in their sensitivity to caffeine, and if coffee drinkers experience problems with falling asleep, they may try to avoid drinking coffee in the afternoon and evening."

He added that people "too often" thought they were a "slave" to their body clocks and programmed to wake up early or late.

"These and other data clearly indicate that we can to some extent modify these rhythms and that part of the reason why we sleep so late relates to factors such as caffeine intake and the exposure to artificial light in the evening," he said.

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If you enjoy the taste of fresh ground, home made coffee there is certain equipment that you will need to make this well. One of the key parts of the home coffee makers equipment is the espresso grinder and this is basically used to reduce coffee beans to the grounds that are used in an espresso machine.

There are a couple of advantages to owning an espresso coffee grinder. Firstly it can be more cost effective than buying pre-packed grounds and although you have the initial outlay of buying the espresso coffee nmachine this should be paid back in time with the cost saving from grinding your own beans. The second advantage is freshness. Generally it is agreed that the sooner after grinding espresso beans that you brew the coffee, the better the coffee will taste. Pre-packed coffee beans can sit on the shelf for a long time before use and therefore the best way to ensure the freshness and quality of the grounds you use is to make your own with an espresso coffee grinder.

If you are considering purchasing an espresso grinder there are a couple of types available on the market. These comprise grinders with a blade and those with a burr. The blade espresso grinder typically has a fan shaped blade that chops up the beans and these tend to be the less expensive type. However the blade type can produce grounds of inconsistent sized grains. If you are looking for more consistent grounds, which is typically said to make better tasting coffee, the espresso burr coffee grinder can be a better choice and this crushes the beans between a stationary surface and a grinding wheel.

Prices for coffee grinders which are suitable for home use can vary between £40 at the more affordable end of the market up to around £600 for the more professional style of grinder. For commercial espresso grinders the price can go up as high as £1000 to £2000 for top grade equipment.

Some of the companies that manufacture coffee grinders include Cimbali, Capresso and Rancilio. Examples of the espresso grinders on the market include The Iberital MC2 At around £130 to purchase this is considered to be one of the best budget grinders available. It has conical steel burrs which provide high precision grinding and has 16 settings allowing extra fine to coarse grinding. It also has a timer which can be set between 5 and 60 seconds and this allows you to work to an accurate grinding time. The Rancilio Rocky Burr Grinder with Doser is considered to be another good grinder and this retails for around £245. This is a medium duty grinder which is good for the home or small business. The grinding wheels are made of high quality hardened, tempered steel which provides a consistent grind and pulling the dosing handle will dispense around 7 grams of ground coffee each time.

To make the best possible home made coffee an espresso grinder can be an essential piece of equipment. It ensures you have the freshest grounds possible to make your daily espresso and this will help you make a great tasting cup of coffee every time.