diff --git a/Supermarket/Food.cs b/Supermarket/Food.cs
index 19dc77f..e89d13d 100644
--- a/Supermarket/Food.cs
+++ b/Supermarket/Food.cs
@@ -8,35 +8,45 @@ public sealed class Food : Product
     public Food(string productName, string barcode, int quantity, params AllergenType[] allergens)
         : base(productName, barcode, quantity)
     {
-        // TODO
-        _allergens = null!;
-        Console.WriteLine($"Remove me, I just make code compile {_allergens}");
+        _allergens = new SortedSet<AllergenType>(allergens);
     }
-
-    // TODO
-    public AllergenType[] Allergens => null!;
-
-    // TODO
-    protected override string[] CsvColumnNames => null!;
+    
+    public AllergenType[] Allergens => _allergens.ToArray();
+    
+    protected override string[] CsvColumnNames => ["Barcode", "ProductName", "Quantity", "Allergens"];
 
     protected override string[] CsvColumnValues
     {
         get
         {
-            // TODO
-            return null!;
+            string allergens = string.Join(AllergenSeparator, Allergens);
+            return [Barcode, ProductName, Quantity.ToString(), allergens];
         }
     }
-
-    // TODO
-    public bool AddAllergen(AllergenType allergen) => false;
-
-    // TODO
-    public bool RemoveAllergen(AllergenType allergen) => false;
+    
+    public bool AddAllergen(AllergenType allergen)
+    {
+        if (ContainsAnyAllergen(allergen))
+        {
+            return false;
+        }
+        
+        _allergens.Add(allergen);
+        return true;
+    }
+    
+    public bool RemoveAllergen(AllergenType allergen) => _allergens.Remove(allergen);
 
     public bool ContainsAnyAllergen(params AllergenType[] allergens)
     {
-        // TODO
+        foreach (var allergen in allergens)
+        {
+            if (_allergens.Contains(allergen))
+            {
+                return true;
+            }
+        }
+        
         return false;
     }
 }
diff --git a/Supermarket/Product.cs b/Supermarket/Product.cs
index 1edf0fb..0593e0e 100644
--- a/Supermarket/Product.cs
+++ b/Supermarket/Product.cs
@@ -27,44 +27,12 @@ public abstract class Product
     
     protected virtual string[] CsvColumnValues => [Barcode, ProductName, Quantity.ToString()];
     
-    public string GetCsvHeader()
-    {
-        string header = String.Empty;
-        for (var i = 0; i < CsvColumnNames.Length; i++)
-        {
-            string columnName = CsvColumnNames[i];
-            
-            if(i == CsvColumnNames.Length - 1)
-            {
-                header += $"{columnName}";
-                break;
-            }
-            header += $"{columnName}{Separator}";
-        }
+    public string GetCsvHeader() => string.Join(Separator, CsvColumnNames);
 
-        return header;
-    }
-    
     public string ToCsv() => ToCsvLine(CsvColumnValues, Separator);
 
-    protected static string ToCsvLine(string[] values, char separator)
-    {
-        string line = string.Empty;
-        for (var i = 0; i < values.Length; i++)
-        {
-            string value = values[i];
+    protected static string ToCsvLine(string[] values, char separator) => String.Join(separator, values);
 
-            if (i == values.Length - 1)
-            {
-                line += $"{value}";
-                break;
-            }
-            line += $"{value}{separator}";
-        }
-
-        return line;
-    }
-    
     public static bool IsBarcodeValid(string? barcode)
     {
         if (barcode == null)