“…Stable isotope ratio analysis of light elements (C, N, S, O and H) has been widely used to investigate food authenticity. Examples are reported for wine (Dordevic et al, 2013), vinegar (Camin et al, 2013;Perini et al, 2014), orange juice (Simpkins et al, 1999), coffee (Santato et al, 2012), olive oil (Camin et al, 2010), cheese (Camin et al, 2012;Pianezze et al, 2020), saffron (Perini et al, 2020), tomatoes (Bontempo et al, 2020;Bontempo et al, 2011), honey (Bontempo et al, 2017), cereals (Asfaha et al, 2011) and also food supplements (Perini et al, 2017). It has also been recognised, since the 90s by several standardisation organizations (CEN, AOAC, OIV, EU Reg.)…”