Whether you're a Grande, Iced, Sugar-Free, Vanilla Latte with Soy Milk or a Triple Venti, Half Sweet, Non-fat, Caramel Macchiato - we all have our caffeinated Achilles' heal. There's the two cups an hour club, the dashing-from-the-station-to-the-office morning grab, and the know-you-shouldn't-but-you-do post-dinner pick me up. And with all manner of milk, strength and calories variations, coffee shops are catering to the health conscious, the animal welfare conscious and the insta-conscious.
With approximately 95 million cups of coffee drunk per day in the UK, caffeine is big business. But it's also the most popular and widely used psychoactive stimulant...or to put it simply, drug.
HOW CAFFEINE WAGES THE WAR ON SLEEP
A pressure to sleep is built up naturally throughout the day, increasing in concentration every minute you are awake. That sleep pressure is actually a chemical called adenosine. The longer you spend awake, the more adenosine will build up. As a result, a desire to sleep usually hits most people after 12-16 hours of being awake.
Now, if you're looking for something to artificially shut down that sleep signal and trick you into feeling more awake - caffeine is your fix.