Hernandez-Martinez, R. (Raquel); Navarro, I. (Iñigo). "Estimation of dietary intake and content of lead and cadmium in infant cereals marketed in Spain" Food Control; 2012, 26(1):6-14.
Lead and cadmium have become highly toxic metallic elements. There is an obvious
5 toxicological impact of these elements on infants since their intestinal absorption is
6 significantly higher than in adults, thus it is desirable to quantify lead and cadmium levels in
7 commonly consumed infant foods. Zeeman background correction, transversely heated
8 graphite furnace atomic absorption spectrometry, was used to determine both the lead and
9 cadmium content of 91 Spanish infant cereals. Cereals were assessed in terms of different
10 types, cereal predominant in formulation and whether it was obtained organically or
11 conventionally. Preliminary analysis revealed a noticeably higher content of lead and
12 cadmium (median, Q1-Q3) in organic cereals (n = 17, Pb: 26.07; 21.36-51.63; Cd: 18.52;
16.56-28.50 μg kg-1 13 ) in relation to conventional ones (n =74, Pb: 10.78; 6.43-19.33; Cd: 7.12;
4.40-11.77 μg kg-1 14 ). Three formulations exceeded European lead maximum levels. Added
15 ingredients (milk, cocoa, fruit and honey) to the cereal base provide lead enrichment. For
16 cadmium, this pattern was observed by cereal based on cocoa, but also the raw materials
17 contributed with a dilution phenomenon, decreasing the final cadmium concentration in infant
18 cereal. Apart from several organically produced cereals, lead content showed a narrow
19 variation, where gluten-free cereals provide lower cadmium content than formulations
20 containing gluten. Dietary intakes of both elements were assessed in comparison with the
21 reference intake values proposed by the EFSA Panel on Contaminants in the Food Chain.
22 Organic infant cereals based on honey and cocoa supplied the highest risk intakes of lead and
23 cadmium, respectively. In accordance with the actual state of knowledge on lead and
24 cadmium toxicity and attending to the upper limits calculated from risk intake values set by
25 EFSA, it seems prudent to call for a revision of both heavy metals content regulated by EC to
set a maximum guideline values for infant cereal at 55 and 45 μg kg-1 26 , respectively.