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Identification and Quantitation of Furocoumarins in Popularly Consumed Foods in the U.S. Using QuEChERS Extraction Coupled with UPLC-MS/MS Analysis.
Journal of Agricultural and Food Chemistry 2017 June 22
Furocoumarins are a class of photoactive compounds found in several plant species and may be responsible for the observed association between consumption of citrus products and the risk of skin cancer. Furocoumarin contents of several foods have been reported previously, but no comprehensive database of furocoumarin content of foods is currently available. Therefore, this study aimed to determine the distribution of furocoumarins in popularly consumed foods in the U.S. Samples of three varieties of each of 29 foods known or suspected to contain furocoumarins were purchased, prepared for analysis using a solid phase extraction method, and analyzed using UPLC-MS/MS for the presence of seven major furocoumarins. Most foods measured contained more than one furocoumarin, and some contained all seven of the furocoumarins examined. Total furocoumarin concentration was greatest in fresh parsley (23215 ng/g), grapefruits (21858 ng/g), lime juice (14580 ng/g), grapefruit juice (95341 ng/g), and limes (9151 ng/g). Bergamottin was found in the greatest proportion of foods sampled (23 of 29), followed by bergapten (19 of 29) and 6'7'-dihydroxybergamottin (16 of 29). These measurements will enable more accurate estimation of dietary furocoumarin exposure and will strengthen future epidemiological work investigating the relationships between furocoumarin intake and health outcomes.
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