Natural bodybuilding is a bodybuilding movement with various competitions that take place for bodybuilders who abstain from performance-enhancing drugs . This categorically excludes the use of substances like anabolic steroids , insulin , diuretics and human growth hormone .  If a bodybuilder meets the requirements of the sanctioning body (the recognized group or authority that sanctions and validates competitions) that they are competing in, then they are considered to be "natural". There are numerous sanctioning bodies who provide their own rules and regulations that govern the competition procedures, event qualifications, banned substance lists, and drug testing methods. Doping detection methods include urinalysis and polygraph testing, and federations typically conduct these tests on the day of competition, or shortly before. Out-of-season testing, although less common, may also be used. Each organization will specify within its rules the length of time that its athletes should be drug-free, which may vary from testing clean on the day of the event, to being drug-free for a number of years, right up to a lifetime natural requirement.
Why should competitors choose natural contests as the ones they compete in? Fairness for one. Why compete against others who could have an advantage from using anabolic steroids when you don't have to? Think it doesn't matter for bikini competitors? It's not always about muscle. Approximately half the people who don't pass a polygraph screening at natural contests are bikini competitors. Remember, anabolic steroids aren't the only things that can make competition unfair. Clenbuterol and Anavar are the popular banned substances with women. They make losing body fat easier.
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.