Urinary DTC excretion after administration of a broccoli sprout extract rich in GR and expressed as percent of dose recovered. A, Baltimore (22). Each line represents a separate subject (means of three daily 8-h values) who received either 25 μmol (○), or 100 μmol of GR (●). Mean overall 24-h excretion is 18%. B, Qidong (25). Overnight urine (approximately 12-h) DTC on Days 5, 9, 10, and 12 from participants who received BSE containing 400 μmol of GR daily for 14 days. Timelines for the 10 individuals whose mean excretion levels of DTC across the 4 days evaluated were the highest and lowest, are shown.