Here’s what he found:
This is when the shot of caffeine starts entering your bloodstream, triggering a spike in heart rate and blood pressure.
Your caffeine levels will have peaked, making you feel alert and energetic with improved concentration.
All the caffeine has now been absorbed and your liver will often respond by absorbing more sugar.
Get ready – you’re about to experience the “sugar crash”. Also, your caffeine levels will drop and you’ll start to feel tired.
The caffeine will have reduced by 50 per cent.
All the caffeine from the drink should now be out of your system. However, exit times vary according to age and activity levels.
If you’re a regular consumer of energy drinks, this is when you’ll start to experience withdrawal symptoms, such as headaches, irritability and constipation.
This is the time it takes your body to become tolerant of your daily caffeine dosage. If you keep your daily levels the same, it’s unlikely you’ll feel any effects by now.
Says nutritionist Ella Allred: “Energy drinks are a bad way to get caffeine. Many people drink them every day to help them survive a busy week. However, relying on those drinks pushes our bodies to the limit.” And sets you up for a crash.