Are You Banting?
The year is 1862. William Banting, a wealthy coffin maker and undertaker, weighs 202 lbs. Having previously tried several weight-loss methods and failed, at the behest of his physician, Dr. William Harvey, Banting starts his seminal low-carbohydrate diet.
Over the course of the next 12 months, Banting lost over 46 lbs. taking his weight down to 156 lbs. After experiencing frustration and failure, having struggled with many other dieting methods, Banting was so impressed with the results of the low-carbohydrate method, he put his method into print in the form of a pamphlet for free distribution to the general public, thinking he would not be able to sell it.
The reception was spectacularly good, selling some 63,000 copies. The diet was so widespread at the time, people would ask: "Do you Bant?".
The word "Bant" entered the English language, meaning "to lose weight".
There's a post with Banting's pamphlet / letter.