Energy drinks do not create energy—they change how fatigue reaches your brain. This evidence-led investigation follows caffeine through the body, from adenosine and heart rate to sugar, sleep, tolerance and the dangerous myth that caffeine can cancel alcohol.
This video is educational and is not personal medical advice. Seek urgent care for chest pain, fainting, severe agitation, confusion or seizures.
00:00 The can opens
00:20 What caffeine blocks
01:20 Alertness and the heart
02:20 How much is in the can?
03:20 Sugar, acid and teeth
04:25 The five-hour clock
05:20 Alcohol, exercise and risk
06:15 The real question
