How did the government encourage people to eat more and buy less in World War 1?

During World War I, the U.S. government encouraged people to eat more and buy less through campaigns promoting "meatless" and "wheatless" days, urging citizens to conserve food resources for soldiers overseas. The Food Administration, led by Herbert Hoover, emphasized the importance of voluntary rationing and created posters and advertisements to promote efficient meal planning and the consumption of alternative foods. These initiatives aimed to reduce food waste and ensure that essential supplies could be sent to support the war effort. Additionally, victory gardens were promoted to encourage households to grow their own vegetables, further reducing reliance on commercial food sources.