Reference:
[1] Probiotics, Prebiotics, and Fibers in Nutritive and Functional Beverages, Maya Raman, ... Mukesh Doble, in Nutrients in Beverages, 2019
[2] Functional Foods and Drinks - Global Market Trajectory & Analytics,Research and Markets, May 2021
[3] What are functional drinks? Austria Juice, April 2021
[4] Informe del Comité Científico de la Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) sobre los riesgos asociados al consumo de bebidas energéticas, June 2021