title: A method for measuring naringenin in biological fluids and its disposition from grapefruit juice by man.
abstract: The major flavonoid in grapefruit juice, naringin, has an aglycone, naringenin, that inhibits some oxidations in vitro and may have in vivo activity. We developed an HPLC method to measure naringenin using a methanol:water mobile phase with UV absorbance detection. The recovery of naringenin was 96%. Two subjects who drank grapefruit juice containing 214 mg naringin daily excreted approximately 30 mg/day of naringenin glucuronide. Thus, naringin is hydrolyzed to naringenin and then conjugated with glucuronic acid prior to excretion of the conjugate.
authors.affiliation: Department of Pharmacology, Cornell University Medical College, New York, NY, USA.
authors.forename: Y S
authors.initials: YS
authors.lastname: Lee
authors.forename: M M
authors.initials: MM
authors.lastname: Reidenberg
mesh_terms: D000897:Anti-Ulcer Agents / Q000493:pharmacokinetics* / Q000652:urine; D001628:Beverages / Q000032:analysis*; D001826:Body Fluids / Q000737:chemistry / Q000378:metabolism*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002957:Citrus / Q000737:chemistry* / Q000378:metabolism; D044950:Flavanones; D005419:Flavonoids / Q000032:analysis / Q000493:pharmacokinetics* / Q000652:urine; D006801:Humans; D008297:Male; D011239:Prednisolone / Q000032:analysis
chemical_list: D000897:Anti-Ulcer Agents; D044950:Flavanones; D005419:Flavonoids; D011239:Prednisolone; C005273:naringenin