Calorie restriction diet
Perm url with updates: http://xahlee.org/Periodic_dosage_dir/pd.html
Been aware of Calorie restriction since about 2004, and have been somewhat practicing it. Basically, “Calorie restriction” is the scientific discovery, started in 1930s. Many animals, when put on a diet of minimal food supply barely enough to sustain life (e.g. the animal is constantly in a hunger state), but with sufficient nutrients, that the animals live much longer and healthier. (e.g. 30% to 40% increase in lifespan.)
In the past 10 years, this has been tested on human animals, and the result so far is positive.
In the past about 5 years, i've been living on a $3 per day diet. (See: Diet of Xah Lee.)
Body Mass Index (BMI) is a easy way to tell if you are too fat or too thin, based on your height and average weight for their height.