This study will examine the extent to which lower doses of a broccoli-derived beverage enhance the detoxication of air pollutants excreted in urine as compared to an maximal dose shown to be effective previously.
This is a 10-day placebo control Phase II broccoli sprout intervention to be conducted in Qidong, P.R. China. Up to twelve hundred people from the farming townships will be screened and one hundred seventy eligible individuals will be enrolled in the study. Participants will be randomized into 4 treatment groups: one will receive a juice beverage containing a standard dose of glucoraphanin- and sulforaphane-rich broccoli sprout powder mixed in pineapple juice, lime juice and water, the second will receive one-half dose, the third one-fifth dose and the fourth group will receive placebo beverage containing pineapple juice, lime juice and water. Participants will drink their assigned beverage every evening and provide consecutive 12-hour urine collections throughout the duration of the study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
170
Maximum, half and one-fifth doses of broccoli sprout-derived beverage compared to placebos.
Placebo as comparison to broccoli sprout-derived beverages
Qidong Liver Cancer Institute
Qidong, Jiangsu, China
Sulforaphane Bioavailability Measured in Sequential 12-Hour Urine Samples
Urinary excretion of broccoli-derived sulforaphane metabolites: sulforaphane-mercapturic acid. The metabolites were measured all 20 of the sequential 12-hour urine collections from each participant over the 10-day intervention period. Data from each individual were summed to provide a single "per 24-hours" value for each participant.
Time frame: 10 days
Modulation of Air Pollutant Excretion in Sequential Overnight 12-Hour Urine Samples
Benzene-mercapturic acid (SPMA) excretion was measured in the sequential overnight 12-hour urine samples collected across the 10-day study period. Data from each individual were summed and averaged to provide a single "per 12-hours" value for each participant.
Time frame: 10 days
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