Wtf is in Celsius??

Energy drink connoisseur, my entire fridge is filled with energy drinks but Celsius has to be a legal form of crack. I feel tired after drinking monsters, alani, bloom, redbull, etc, but Celsius immediately makes me feel productive and energized, like I got a full 8 hours of sleep. If I drink a full can I can workout for a few hours without feeling exhausted 😭 I was in the best shape of my life when I was drinking them almost daily (my heart’s probably in shambles tbh). What sets these apart from other drinks? Or is it just placebo