Why are energy drinks not healthy?

Energy drinks often contain added sugars, high levels of caffeine, and potentially problematic artificial sweeteners. Some people have experienced adverse effects like nervousness, insomnia, digestive troubles, irregular heartbeat, and in the most severe cases, caffeine intoxication or overdose, seizures, or death. It's always a good idea to consult with a nutritionist or a doctor and consume in moderation if at all.