...
      foreach (string item in itemList) {            
         if (GUI.Button(new Rect(posX, posY, width, height),
                  "Przygotuj "+item)) {
            Managers.Inventory.EquipItem(item);
         }

         if (item == "health") {                     
            if (GUI.Button(new Rect(posX, posY + height+buffer, width,
                        height), "Use Health")) {   
               Managers.Inventory.ConsumeItem("health");
               Managers.Player.ChangeHealth(25);
            }
         }

         posX += width+buffer;
      }
   }
}
