Minecraft wiki entry for Hunger_management, associated text: Advantages:
Restore a lot of health and gives you an extra 16 × 8 for damage absorption.
Cause temporary constant health regeneration that is not dependent on the player's hunger.
Restore 9.6 saturation, considering their low hunger restoration.
Give 2 minutes of absorption IV, regeneration II‌[JE only]/V‌[BE only], resistance and fire resistance.