Evaluation of the level of chromium and nickel in selected dietary supplements (containing antioxidant compounds) available in Poland
Keywords:
dietary supplements, chromium, nickel, flame atomic absorption spectrometer (FAAS)Abstract
Among the dietary supplements whose assortment is still increasing, preparations containing anti-oxidants constitute an important group protecting the human organism against free radicals. As there is a scarcity of studies concerning the content of the microelements essential for human the body in dietary supplements, contents of chromium and nickel in preparations applied in the prevention of illnesses and in the therapy of the sight organ were studied and as well as in the therapy of the sight organ – Aronia z luteiną (Chokeberry with luteine), Bilberin, Maxi Vision, Naturapia wzrok, Oculobon, Pro-wzrok, Vitalux) and those containing garlic in their composition – Aktiv Kapseln, Aliovital, Alitol, Bio-czosnek (Bio-garlic), Czosnek forte (Garlic forte), Czosnek z pietruszką (Garlic with parsley ), Garlicin, Tabletki z czosnkiem (Tablets with garlic). Samples (4–5 gram) were mineralized “dry” in temperature of 450˚C. The amounts of the studied elements were determined in of the Pye Unicam SP 192 atomic absorption spectrometer: chromium directly from the mineralisate, and nickel after the extraction up to the organic phase (MIBK). Contents of chromium ranged, on average from 0.04 µg/g to 6.85 µg/g, and those of nickel from 0.03 µg/g to 1.98 µg/g. The indicated amounts of chromium and nickel in inspected dietary supplements were diversified and they depended on the composition of the preparation. Contents of these elements taken with the maximum daily dose declared by the producer can be regarded safe for the human body and they supplement the daily demand of the organism for these microelements in the supplementation process.
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