Buss D H
J Hum Nutr. 1979 Feb;33(1):47-55. doi: 10.3109/09637487909143349.
The 1979s saw rapid increases in prices, including food prices, but incomes also increased rapidly. Many other factors, such as the growth in home-freezer ownership, could also have affected dietary habits. Yet the National Food Survey shows that although less food is now bought for use in the home (9.5 MJ/person/day compared with 10.7 MJ in 1970), the overall distribution of the diet between meat, fish, dairy products, cereals, sugar, fats, fruit and vegetables remained comparatively steady. Greater changes in consumption of foods within the same broad groups had little effect on overall nutrient intakes, so that the nutritional quality of the diet (measured as nutrients/MJ) actually increased.
20世纪70年代物价迅速上涨，包括食品价格，但收入也迅速增加。许多其他因素，如家用冰柜拥有量的增长，也可能影响饮食习惯。然而，全国食品调查显示，尽管现在家庭购买用于食用的食物减少了（每人每天9.5兆焦耳，而1970年为10.7兆焦耳），但饮食中肉类、鱼类、奶制品、谷物、糖、脂肪、水果和蔬菜的总体分布仍相对稳定。同一大类食物消费的较大变化对总体营养素摄入量影响不大，因此饮食的营养质量（以营养素/兆焦耳衡量）实际上有所提高。
