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

--- a/net/minecraft/world/effect/SaturationMobEffect.java
+++ b/net/minecraft/world/effect/SaturationMobEffect.java
@@ -3,6 +3,11 @@
 import net.minecraft.world.entity.EntityLiving;
 import net.minecraft.world.entity.player.EntityHuman;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+// CraftBukkit end
+
 class SaturationMobEffect extends InstantMobEffect {
 
     protected SaturationMobEffect(MobEffectInfo mobeffectinfo, int i) {
@@ -12,7 +17,15 @@
     @Override
     public boolean applyEffectTick(EntityLiving entityliving, int i) {
         if (!entityliving.level().isClientSide && entityliving instanceof EntityHuman entityhuman) {
-            entityhuman.getFoodData().eat(i + 1, 1.0F);
+            // CraftBukkit start
+            int oldFoodLevel = entityhuman.getFoodData().foodLevel;
+            org.bukkit.event.entity.FoodLevelChangeEvent event = CraftEventFactory.callFoodLevelChangeEvent(entityhuman, i + 1 + oldFoodLevel);
+            if (!event.isCancelled()) {
+                entityhuman.getFoodData().eat(event.getFoodLevel() - oldFoodLevel, 1.0F);
+            }
+
+            ((CraftPlayer) entityhuman.getBukkitEntity()).sendHealthUpdate();
+            // CraftBukkit end
         }
 
         return true;