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Hydrogen sulphide (H2S) is generated endogenouslyfrom L-cysteine (L-Cys) by the enzymes cystathionine-β-synthase (CBS) and cystathionine-γ-lyase (CSE).In addition,L-Cys is commonly used as a precursor in the food and pharmaceutical industries.The aim of the present study was to determine whether L-Cys regulates intestinal nutrient transport.