Journal
FOOD RESEARCH INTERNATIONAL
Volume 38, Issue 8-9, Pages 1051-1058Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2005.03.016
Keywords
red beet juice; antioxidants; betalains; urinary excretion; human
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The aim of the present study was to assess the renal excretion of red beet juice (RBJ) antioxidants in six healthy humans. After a single oral dose of RBJ. The pharmacokinetic parameters obtained from urine were compared to those obtained after ingestion of water on an intra-individual basis. Urine was collected in intervals up to 24 h post-intake. After RBJ ingestion, the betacyanins betanin and isobetanin were excreted in the volunteers' urine (0.28% of the administered dose) and unambiguously identified by HPLC-ESI-MS/MS. Compared to the ingestion of water, RBJ consumption resulted in a significantly increased urinary excretion of total phenolics (51.1% of the administered phenolics) and other antioxidant compounds (43.9% of the administered compounds) within 24 h. (c) 2005 Elsevier Ltd. All rights reserved.
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