Harlow was on an extreme fad diet to maintain her slim figure. The “Four-Day Diet” became a sensation during the 1930s, which involved eating a lot of oranges, tomatoes, black coffee, and broiled lamb chops for four days. On the fifth day, dieters were told to dose themselves with magnesium citrate, a powerful saline laxative that is now most commonly used before surgical procedures. They were also supposed to chug fruit juice on the fifth day.