Food waste in the United Kingdom Meanwhile, in the United States (where shortages were hardly comparable), legislators considered laws restricting the distribution of food in order to cut waste, breaches of which might be punishable by fines or imprisonment. During World War II, rationing was imposed almost immediately. Restrictions were immediately more stringent than in the Great War as with effect from 8 January 1940, ration books were issued and most foods were subject to ration. By August 1940, legislation was passed that made the wasting of food a prisonable offence. Posters encouraged kitchen waste to be used for feeding animals, primarily swine but also poultry.
Rationing limited diet, while simulating the strenuous wartime physical work Britons would likely have to perform. The scientists found that the subjects' health and performance remained very good after three months. They also headed the first ever mandated addition of vitamins and mineral to food, beginning with adding calcium to bread. Their work became the basis of the wartime austerity diet promoted by the Minister of Food Lord Woolton. Britons' actual wartime diet was never as severe as in the Cambridge study because imports from America successfully avoided the U-boats, but rationing improved the health of British people; infant mortality declined