What type of food is illegal to sell?

Food that has passed its use-by date is illegal to sell because the use-by date is a critical indicator of food safety. This date is determined by the manufacturer based on food safety assessments that ensure the product is safe to consume up until that point. After the use-by date, the safety of the food cannot be guaranteed, and it can pose health risks such as foodborne illnesses if consumed.

Selling products past their use-by date is not compliant with food safety regulations, as it compromises consumer health. This strict regulation helps ensure that food establishments do not contribute to potential health risks associated with expired products.

In contrast, foods that contain additives (the first choice) are legal to sell as long as those additives are approved and within regulatory guidelines. Gluten-free foods (the third choice) need proper labeling for consumer awareness but are not illegal to sell if they do not have such labeling. Lastly, a food product having less than a 5-day shelf-life is not illegal to sell; it simply indicates that it needs to be consumed quickly, but as long as it's within a safe time frame, it can be sold.