diff --git a/lib/screens/add_product.dart b/lib/screens/add_product.dart
index b650d41..2468615 100644
--- a/lib/screens/add_product.dart
+++ b/lib/screens/add_product.dart
@@ -43,11 +43,13 @@ class _AddProductScreen extends State<AddProductScreen> {
     );
   }
 
-  Future<double?> _parseDouble(String text, String name) async {
+  Future<double?> _parseDouble(String text, String name, {bool silent = false}) async {
     try {
       return double.parse(text.replaceAll(",", "."));
     } catch (e) {
-      showError("$name must be a number");
+      if (!silent) {
+        showError("$name must be a number");
+      }
       return null;
     }
   }
@@ -56,9 +58,9 @@ class _AddProductScreen extends State<AddProductScreen> {
     var carb = await _parseDouble(carbController.text, "Carbs");
     var fat = await _parseDouble(fatController.text, "Fat");
     var protein = await _parseDouble(proteinController.text, "Protein");
-    var fiber = await _parseDouble(fiberController.text, "Fiber");
+    var fiber = await _parseDouble(fiberController.text, "Fiber", silent: true) ?? 0;
 
-    if (carb == null || fat == null || protein == null || fiber == null) {
+    if (carb == null || fat == null || protein == null) {
       return;
     }