**5. Conclusions**

The results of this study reinforce the evidence of the risk associated with the presence of undeclared allergens on food labels for allergic patients. Of particular concern is the undeclared presence of those allergens with the highest prevalence in the pediatric population, in foods frequently consumed by this population, such as cereal and bakery products, prepared dishes and snacks, and cocoa and confectionery. Manufacturers and safety authorities should increase their efforts to face this risk, and educational programs could enforce patients' knowledge about potential, undeclared-allergen food products with official resources and webpages, such as the RASFF consumers' portal, which share updated food allergen alerts.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/ 10.3390/nu14081571/s1. Table S1: Food products included per food category in the RASFF notifications from 2018 to 2021.

**Author Contributions:** Conceptualization: C.Y.-R.; methodology: C.Y.-R.; formal analysis: M.M.-P. and C.Y.-R.; investigation: M.M.-P. and C.Y.-R.; resources: C.Y.-R.; data curation: M.M.-P.; writing original draft: M.M.-P. and C.Y.-R.; writing—review and editing: M.M.-P. and C.Y.-R.; visualization: M.M.-P.; supervision: C.Y.-R.; funding acquisition: C.Y.-R.; project administration: C.Y.-R. All authors have read and agreed to the published version of the manuscript.

**Funding:** The APC was funded by the Government of Aragón (grant Grupo A06-20R).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
