diff --git a/backend/product/views.py b/backend/product/views.py
index b2a991b..86dd14b 100644
--- a/backend/product/views.py
+++ b/backend/product/views.py
@@ -203,24 +203,32 @@ class AllProductsView(APIView):
     def get(self, request):
         try:
             category_slug = request.query_params.get('category')
-            products = ProductModel.objects.all()
+
+            # Start with optimized base query
+            products = ProductModel.objects.select_related(
+                'category',
+                'category__parent'
+            ).prefetch_related(
+                'variants__product_attributes__attribute_type',
+                'variants__images',
+            )
 
             if category_slug:
                 if 'category' not in category_slug:
                     sub_category = get_object_or_404(
                         SubCategoryModel, slug=category_slug)
-                    products = ProductModel.objects.filter(
-                        category=sub_category)
+                    products = products.filter(category=sub_category)
                 else:
                     main_category = get_object_or_404(
                         MainCategoryModel, slug=category_slug)
                     sub_categories = main_category.subcategorys.all()
-                    products = ProductModel.objects.filter(
-                        category__in=sub_categories)
+                    products = products.filter(category__in=sub_categories)
+
             in_stock = request.query_params.get('in_stock')
             if in_stock is not None:
                 if in_stock.lower() == 'true':
-                    products = products.filter(variants__in_stock__gt=0)
+                    products = products.filter(
+                        variants__in_stock__gt=0).distinct()
                 elif in_stock.lower() != 'false':
                     return Response({'detail': 'in_stock must be "true" or "false".'}, status=status.HTTP_400_BAD_REQUEST)
 
@@ -228,7 +236,8 @@ class AllProductsView(APIView):
             has_discount = request.query_params.get('has_discount')
             if has_discount is not None:
                 if has_discount.lower() == 'true':
-                    products = products.filter(variants__discount__gt=0)
+                    products = products.filter(
+                        variants__discount__gt=0).distinct()
                 elif has_discount.lower() != 'false':
                     return Response({'detail': 'has_discount must be "true" or "false".'}, status=status.HTTP_400_BAD_REQUEST)
 
@@ -372,6 +381,16 @@ class ShowCaseProductsView(APIView):
     def get(self, request):
         try:
             category_id = request.query_params.get('slider_category', None)
+
+            # Start with optimized base query
+            products = ProductModel.objects.select_related(
+                'category',
+                'category__parent'
+            ).prefetch_related(
+                'variants__product_attributes__attribute_type',
+                'variants__images',
+            )
+
             if category_id:
                 try:
                     category_id = int(category_id)
@@ -381,22 +400,22 @@ class ShowCaseProductsView(APIView):
                 slider_category = get_object_or_404(
                     ShowCaseSlider, pk=category_id)
 
-                products = ProductModel.objects.filter(
+                products = products.filter(
                     variants__slider_category=slider_category).distinct()
             else:
-                products = ProductModel.objects.filter(
+                products = products.filter(
                     variants__slider_category__isnull=False).distinct()
 
             # Filter by stock status if `in_stock` is specified
             in_stock = request.query_params.get('in_stock', "false") == 'true'
             if in_stock:
-                products = products.filter(variants__in_stock__gt=0)
+                products = products.filter(variants__in_stock__gt=0).distinct()
 
             # Filter by discount if `has_discount` is specified
             has_discount = request.query_params.get(
                 'has_discount', "false") == 'true'
             if has_discount:
-                products = products.filter(variants__discount__gt=0)
+                products = products.filter(variants__discount__gt=0).distinct()
 
             # Search filter
             search_query = request.query_params.get('search', None)
@@ -460,8 +479,10 @@ class CommentView(APIView):
     )
     def get(self, request, slug):
         product = get_object_or_404(ProductModel, slug=slug)
+        # Optimize comments query to prefetch user data
         comments = product.comments.filter(
-            review_status__in=['not_reviwed', 'reviewed_and_confirmed'])
+            review_status__in=['not_reviwed', 'reviewed_and_confirmed']
+        ).select_related('user')
         paginator = self.pagination_class()
         paginated_comments = paginator.paginate_queryset(comments, request)
         comments_ser = self.serializer_class(