Abstract
This study describes a practical and suitable approach to solve a real problem: the analysis of polyherbal products for which some specifications addressing the composition are lacking (e.g. chemical components). It is reported that an analytical procedure to verify the possible presence in a botanical supplement of a plant is not authorised for use in Italy. No reference of chemical standards for the known components of the plant is commercially available. For this reason and because a rapid response was required, more selective chromatographic techniques such as high-performance liquid chromatography, gas chromatography and liquid chromatography–mass spectrometry were excluded and thin layer chromatography was chosen for applying different experimental procedures. The original English label of the product, which is made by a leading US manufacturer and sold online by American and Italian distributors, lists the same herbal ingredients as the Italian label, but with an addition of Eurycoma longifolia Jack, which is not included in the list of plants admitted in supplements compiled by the Italian Ministry of Health. For greater certainty of the result, a high-performance thin layer chromatography method was then applied. On the basis of the results obtained, it was possible to confirm that E. longifolia Jack was not present in the product.
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