diff --git a/app/Http/Controllers/FoodController.php b/app/Http/Controllers/FoodController.php
index e8d1db5..80f0782 100644
--- a/app/Http/Controllers/FoodController.php
+++ b/app/Http/Controllers/FoodController.php
@@ -104,9 +104,13 @@ class FoodController extends Controller
         $food->fill($attributes)->save();
 
         // Sync tags.
-        if ($tags = $request->get('tags')) {
+        $tags = $request->get('tags');
+        if (!empty($tags)) {
             $food->syncTags(explode(',', $tags));
         }
+        elseif ($food->tags->isNotEmpty()) {
+            $food->detachTags($food->tags);
+        }
 
         session()->flash('message', "Food {$food->name} updated!");
         return redirect()->route('foods.show', $food);
diff --git a/app/Http/Controllers/RecipeController.php b/app/Http/Controllers/RecipeController.php
index c36175b..6e12769 100644
--- a/app/Http/Controllers/RecipeController.php
+++ b/app/Http/Controllers/RecipeController.php
@@ -262,9 +262,13 @@ class RecipeController extends Controller
         }
 
         // Sync tags.
-        if ($tags = $request->get('tags')) {
+        $tags = $request->get('tags');
+        if (!empty($tags)) {
             $recipe->syncTags(explode(',', $tags));
         }
+        elseif ($recipe->tags->isNotEmpty()) {
+            $recipe->detachTags($recipe->tags);
+        }
 
         // Handle recipe image.
         if (!empty($input['image'])) {