Look, if you're sick of reading them, imagine how we feel writing about them.
This craze has taken over the internet and we're not one bit happy about it, but here's the latest one, Red Bull.
In the first 10 minutes: The caffeine starts to be absorbed into your bloodstream, your body responds by increasing your heart rate and blood pressure.
>15 to 45 minutes: At some point during the first 15-45 minutes depending how fast you drink it the levels of caffeine will peak, you'll feel alert and find your concentration is improved, this is due to caffeine being a stimulant drug. This is when it's recommended to drink one if you are driving and feel you need to be more alert.
> 30-50 minutes: After you finish your drink and your body has now fully absorbed the caffeine , your liver will often then react by absorbing more sugar. It's during this time that your body has also absorbed most of the sugar initially in the drink as well.
>60 minutes: An hour in and you'll likely be getting the dreaded 'sugar crash' , this often is a mix of the sugar levels in your bloodstream dropping as well as the effects of the caffeine dying down.
> Five to six hours: Roughly five to six hours is the half-life of caffeine. This means that it takes this many hours for your body to reduce the caffeine content in your bloodstream by 50 per cent. For women who take an oral contraceptive this time is doubled.
>12 hours: 12 hours after finishing your energy drink for most people all the caffeine will have been removed from your bloodstream, the exact speed or time will vary from person to person.
> Seven to 12 days: Studies have shown that this is the time frame that your body will become tolerant of your daily caffeine dosage, one study found those who took a caffeine pill while others had a placebo, showed identical moods, alert levels and energy after 18 days, those who had the high dosage of caffeine had got used to the caffeine fix.
Via Daily Mail