diff --git a/public/userarea/gridRenderer.js b/public/userarea/gridRenderer.js
index 004a667..d511a4d 100644
--- a/public/userarea/gridRenderer.js
+++ b/public/userarea/gridRenderer.js
@@ -349,7 +349,7 @@
                     return {
                         field_id: fieldId,
                         q: params.term || "",
-                        limit: 10,
+                        limit: 0, // 0 = no limit for custom field values
                     };
                 },
                 processResults: function (data) {
diff --git a/public/userarea/search_customfield_values.php b/public/userarea/search_customfield_values.php
index f0c8273..6e4205a 100644
--- a/public/userarea/search_customfield_values.php
+++ b/public/userarea/search_customfield_values.php
@@ -2,7 +2,11 @@
 require_once dirname(__DIR__, 2) . '/vendor/autoload.php';
 require_once __DIR__ . '/class/db-functions.php';
 include dirname(__DIR__) . '/../extra/auth.php';
-if (!Auth::check()) { http_response_code(401); echo json_encode(['error' => 'Unauthorized']); exit; }
+if (!Auth::check()) {
+    http_response_code(401);
+    echo json_encode(['error' => 'Unauthorized']);
+    exit;
+}
 
 require_once __DIR__ . '/class/VisualLimsApiClient.class.php';
 
@@ -13,7 +17,8 @@ error_reporting(E_ALL);
 $fieldId = intval($_GET['field_id'] ?? 0);
 $q = mb_strtolower(trim($_GET['q'] ?? ''));
 $id = isset($_GET['id']) ? intval($_GET['id']) : null;
-$limit = max(1, min(50, intval($_GET['limit'] ?? 20)));
+$rawLimit = intval($_GET['limit'] ?? 20);
+$limit = $rawLimit <= 0 ? 0 : max(1, min(500, $rawLimit));
 
 if (!$fieldId) {
     echo json_encode(['results' => []]);
@@ -52,7 +57,7 @@ try {
         $text = $v['Valore'] ?? '';
         if ($q === '' || mb_strpos(mb_strtolower($text), $q) !== false) {
             $results[] = ['id' => $v['IdCustomFieldsValue'], 'text' => $text];
-            if (count($results) >= $limit) break;
+            if ($limit > 0 && count($results) >= $limit) break;
         }
     }