An apple for a god.
If this apple is eaten, you will obtain a metaphorical shield that will absorb all damage you take, up to 90% of your durability. You will be able to regenerate your entire body in 20 seconds as long as your brain isn't completely destroyed. You are also completely immune to heat and fire, and take 80% less damage.
The effects last for 5 minutes, and you receive a new one every week within a pocket dimension for Gapples that only you can access, with no limit on how many you can have.
It does not remove diseases or poisons, as it only heals you from the symptoms.