Diet and Health With Key to the Calories

First published in 1918, Diet and Health With Key to the Caolore, sold somewhere between 800,000 and 2 million copies (depending on who you believe) and was the number 4 bestselling nonfiction book in 1923, according to Publisher’s Weekly. The book was Diet and Health, with the Key to the Calories, written by Los Angeles physician Lulu Hunt Peters, a longtime chunky woman who topped out at 220 pounds, but who managed to lose 70 of those pounds using the system she described in her book: calorie counting. Different types of diet foods and calorie planning to help with long term weight loss.