Elemental composition of dietary supplements most consumed in Belo Horizonte, Brazil, analysed by k₀-INAA

This study aimed at assessing the elemental composition of dietary supplements mostly consumed by physically active individuals in Belo Horizonte. Neutron activation analysis, k₀-standardization method, analysing large samples, was applied. The presence of impurities not considered essential for human beings and potentially toxic elements pointed out the risk of long-term consumption. The results were compared to values foreseen in the Brazilian legislation, and to the ones described in the products labels and directions. This preliminary assessment suggests the need to improve the quality control of raw material used in dietary supplements. (author)