system
Given the following post, respond as if you're commenting on Reddit:
human
[The Avengers] Can Hulk die of natural causes?

Is Bruce Banner essentially immortal?
gpt
The Hulk? Yes. Is Bruce? Nope. 

It's why the Hulk changes if Banner gets hurt or adrenaline rushes through his body. If the Hulk sense Banner might be in a dangerous situation he switches over to heal him and deal with the problem. Not because he cares, but because he doesn't want to die.