Glucobrassicin-Brussel Sprout Effect on D10 Phe Metabolism

Subjects will be given 1 microgram of \[D10\]phe, and all urine will be collected for 6 h afterwards to quantify baseline levels of \[D10\]phenanthrene tetraol (\[D10\]pheT) and \[D10\]phenanthrols (\[D10\]HOP). Within 3 days of this baseline measurement, subjects will consume 200 micromoles of glucobrassicin in the form of raw Brussels sprouts (\~200-300 grams) at the study center once daily for 7 consecutive days. Urine will be collected for 24 h after vegetable consumption on days 3 ± 1 and 6 of the feeding intervention for 3,3'-diindolylmethane (DIM) quantification. On day 7 of the feeding intervention, a second dose of 1 microgram of \[D10\]phe will be administered at the study center after vegetable consumption, followed by another 6 h urine collection.