During the 1940s, the US promoted high-quality protein sources like liver, eggs, beef, chicken, and dairy, along with fruits, vegetables, and salt, as critical for national strength and vitality.

“here's how to help uncle because what they recognized was they needed strong they talked a lot about vitality and strength and muscle Health in the 40s what they did is they they pushed out these pamphlets and they said if you want to help Uncle Sam here's how to do it you'll eat high quality protein a big high quality protein lunch with liver and eggs and beef and chicken and dairy you will also eat fruits and vegetables you will also salt your food you will you will like have salt”