You can still die, just not from hunger/thirst.
And you have to hide it, or else governments around the world are gonna lock you to a blacksite and experiment on you. (I mean, you are essentially a weird mutant / supernatual being, governments be paranoid)
“Weird, you havent eaten for days, and you seems to still have so much energy.”
a few moment later
“🚨🚔🚨 over radio IN PURSUIT OF AN EXTRATERRESTIAL LIFE FORM…”
(Sorry if I’m being silly, I kinda just envisioned a universe where people have strange abilities and a totalitarian government is paranoid and want to lock up everyone with special abilities)