Food labels might be one of the main sources of information and guarantees of protection of the population against the abusive practices of the industry. A commited information and knowledge organization on food labels allows the population to be better informed on nutrition and health. Considering food labels as spaces of knowledge organization, we aim to analyze some of the decisions with ethical implications in the form of equivalence relationships that can be used in these spaces. More specifically, we analyzed the listing of sugars and the use of synonyms of sucrose in cereal bars, as this is one of the most controversial aspects in relation to nutrition and health claims. We conclude that the analyzed food labels do not clearly inform the content of sugars in foods while using rhetorical features, legal subterfuges, and unethical attitudes to present the products in a more marketable way.