If you are serious about gaining muscle mass and especially about losing body fat you carefully have to monitor what and how much you eat every day. I have developed a very convenient tool for natural bodybuilders that can help you build your personal diet plan. It is an excel workbook that calculates how many calories, carbs, protein, fat, vitamins and minerals you need to eat every day. The excel sheet contains nutritional data for about 8000 different foods. You can watch the youtube demo video below or download the high quality video in Windows Media Video (.wmv) or Flash (.swf) format. Download the TNBB diet plan excel now for free.