The slogan ‘Weet wat je eet’, literally ‘Know what you eat’, for the sake of rime translated as ‘Read what you eat’, is habitually used in the Netherlands to improve the food habits of the population. What is needed to know, is given by a well known tool, formulated half a century ago, as ‘De Schijf van Vijf’, ‘The Five part Pie chart’. The tool refers to five ‘groups of food which constitute the base of a healthy nutrition’ and recently to five rules of conduct ‘for the choosing and eating consumer’ as well. The base is formulated in chemical terms, the rules in quantitative. To eat is to measure is to know. But since 25 years science has evolved. Mankind does not eat by mere natural science. Food has become the object of unconventional but highly acclaimed research, initiated by amateurs. Dutch universities ignored this development. Consequently the Dutch consumer has to visit amateurs to be able to read what you eat.