PaperMC/paper-server/patches/sources/net/minecraft/world/effect/SaturationMobEffect.java.patch

--- a/net/minecraft/world/effect/SaturationMobEffect.java
+++ b/net/minecraft/world/effect/SaturationMobEffect.java
@@ -12,7 +_,15 @@
     @Override
     public boolean applyEffectTick(ServerLevel level, LivingEntity entity, int amplifier) {
         if (entity instanceof Player player) {
-            player.getFoodData().eat(amplifier + 1, 1.0F);
+            // CraftBukkit start
+            int oldFoodLevel = player.getFoodData().foodLevel;
+            org.bukkit.event.entity.FoodLevelChangeEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callFoodLevelChangeEvent(player, amplifier + 1 + oldFoodLevel);
+            if (!event.isCancelled()) {
+                player.getFoodData().eat(event.getFoodLevel() - oldFoodLevel, 1.0F);
+            }
+
+            ((org.bukkit.craftbukkit.entity.CraftPlayer) player.getBukkitEntity()).sendHealthUpdate();
+            // CraftBukkit end
         }
 
         return true;