molecules Article Carbon and Nitrogen Isotope Ratios of Food and Beverage in Brazil Luiz A. Martinelli 1,*, Gabriela B. Nardoto 2 , Maria A. Z. Perez 1, Geraldo Arruda Junior 1, Fabiana C. Fracassi 1, Juliana G. G. Oliveira 1, Isadora S. Ottani 1, Sarah H. Lima 1, Edmar A. Mazzi 1, Taciana F. Gomes 1 , Amin Soltangheisi 1 , Adibe L. Abdalla Filho 1 , Eduardo Mariano 1, Fabio J. V. Costa 3 , Paulo J. Duarte-Neto 4 , Marcelo Z. Moreira 1 and Plinio B. Camargo 1 1 Laboratory of Isotope Ecology, Center for Nuclear Energy in Agriculture, University of São Paulo, Av. Centenário, 303, São Dimas, Piracicaba CEP 13416-000, SP, Brazil;
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[email protected] (P.B.C.) 2 Ecology Department, Institute of Biological Sciences, University of Brasília, Asa Norte, Brasília CEP 70910-900, Brazil;
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[email protected]; Tel.:+55-193-429-4074 Academic Editors: Nives Ogrinc and Federica Camin Received: 27 January 2020; Accepted: 6 March 2020; Published: 24 March 2020 Abstract: Several previous studies on targeted food items using carbon and nitrogen stable isotope ratios in Brazil have revealed that many of the items investigated are adulterated; mislabeled or even fraud.