Presenting: The Orange! You get one every time you enter your world. But be careful to not eat them in the wrong hand...
The potential consequences are as follows if you do:
1 in 100 chance to just straight up kill you
Your health gets randomized if you have stripped acacia wood ANYWHERE in your inventory
Turn poison into regeneration (and vice versa)
Set you on fire for 1 hour if you're within 16 blocks of a cow
Spawns a creeper if you're standing on coarse dirt
Gives you levitation 50 for 5 seconds if you're in a sparse jungle
Pushes you backwards if you're moving
Pushes you upwards if you're falling
Pushes you downwards if you're ascending
Switches your x and z coordinates then teleports you to the surface if you're in a dripstone cave
1 in 1,000,000 chance you'll get an achievement and a ton of xp
These activate in the order listed, starting from the top and ending at the bottom. Have fun!
Oh and oranges are actually decent food sources, providing 2 hunger and 10 saturation.