Editorial use only Laboratory tests on food supplements. Chemist preparing samples of dietary supplements for analysis with mass spectrometry. The tes

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Editorial use only Laboratory tests on food supplements. Chemist preparing samples of dietary supplements for analysis with mass spectrometry. The tests are intended to show whether the products contain undisclosed and potentially dangerous ingredients. Photographed on 5 February 2009, at a US Food and Drug Administration (FDA) site in Irvine, California, USA.

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