According to Brazilian and Mercosur legislation, food labeling is mandatory for all ready-for-sale foods packaged in the absence of the consumer. Labels must contain descriptive information on packaged foods and beverages, including the ingredients list and nutrition labeling ). The nutrition facts label must contain quantitative descriptions of energy value, carbohydrates, proteins, total fat, saturated fat, TFA, and sodium. Although TFA information is mandatory, current legislation has limitations that make it difficult for consumers to correctly identify TFA in food products by using food labels (. One such example is the possibility for manufacturers to declare a TFA content of 0 g in the nutrition facts label when the product contains less than or equal to 0.2 g of TFA per serving, without any distinction between naturally occurring TFA and i-TFA.