Williams C
Department of Public Health and Policy, London School of Hygiene and Tropical Medicine.
BMJ. 1995 Jun 3;310(6992):1453-5. doi: 10.1136/bmj.310.6992.1453.
Consumers need health information which is clear and unambiguous. Advice to "eat more fruit and vegetables" gives consumers no guidance on the quantities involved. Popular advice is to eat "five portions a day." This paper provides a rationale for determining which foods are included within this advice--for example, processed foods such as baked beans are but potatoes and nuts should not be. It also describes how much of the most commonly consumed fruit and vegetables constitutes a "portion." A bowlful of salad, for example, is needed to make up a portion but an apple or banana on its own will count.
消费者需要清晰明确的健康信息。建议“多吃水果和蔬菜”并未就具体数量给予消费者指导。普遍的建议是每天吃“五份”。本文为确定该建议所涵盖的食物提供了理论依据——例如，像烘豆这样的加工食品属于其中，但土豆和坚果则不属于。它还描述了最常食用的水果和蔬菜多少量构成一份。例如，需要满满一碗沙拉才算一份，但一个苹果或一根香蕉本身就算一份。
