Caffeine works by blocking adenosine receptors, which prevents the brain from receiving a slow-down signal, whether in the early morning or late at night. For those looking to break this habit, Tim Mercer confirms that one method that should not be underestimated is the placebo effect of using decaffeinated coffee. There are many types of tea, coffee, and even some caffeine-free soft drinks available. As for tea, if the bag is not left in too long, it contains between 50 and 80 mg, which means it's possible to drink more cups of tea compared to coffee. Mercer also adds that some energy drinks contain between 80 and 160 mg of caffeine, which can increase the risk of what is known as 'caffeine toxicity'. This condition manifests through a range of harmful symptoms, including heart palpitations, a feeling of a racing pulse, increased anxiety, and impaired decision-making ability. It can also lead to an increased urge to urinate and problems like acid reflux and heartburn. Mercer warns about the 'dark side' of caffeine, describing it as a 'narcotic substance' that can cause addiction. He says: 'It starts with a morning cup of coffee that gives you energy, then it turns into a need for a second cup before leaving the house, and maybe another one before leaving work to be able to stay alert while driving.' Over time, many get stuck in a vicious cycle: the last cup is drunk late at night, leaving caffeine in the body when trying to sleep, which leads to delayed sleep onset and waking up early without fully clearing adenosine during the night. Adenosine is a natural compound that builds up in the brain during wakefulness and contributes to promoting the feeling of sleepiness later. Doctors warn people who rely on caffeine-rich tea, coffee, and energy drinks about the need to recognize the moment when it could turn into a 'dangerous poison'. While most people believe that a few cups won't do any harm, excessive consumption can affect the heart, cognitive functions, and more. Doctor Tim Mercer explains: 'An average cup of coffee at home contains about 100 mg of caffeine, and one can drink three or four of them.'
