diff --git a/backend/src/routes/products.js b/backend/src/routes/products.js
index 9b5b61a..91f972f 100644
--- a/backend/src/routes/products.js
+++ b/backend/src/routes/products.js
@@ -119,7 +119,7 @@ router.get('/', async (req, res, next) => {
           customBrand: product.custom_brand,
           categoryId: product.category_id,
           categoryName: product.custom_category_name || product.category_name,
-          productType: product.custom_product_type || product.base_product_type,
+          productType: product.custom_product_type || product.base_product_type || null,
           customProductType: product.custom_product_type,
           activeIngredients: product.custom_active_ingredients,
           customActiveIngredients: product.custom_active_ingredients,