(a).

Enzyme	Food, beverage, or bioactive compounds  Food sources in italics	Type of study	Dosages used and references
CYP2A	Chicory root	In vivo	Diet of 10% dried chicory root [41]
CYP2A6	Quercetin  Apple, apricot, blueberries, yellow onion, kale, alfalfa sprouts, green beans, broccoli, black tea, and chili powder [47, 48]	Clinical	500 mg/d quercetin [29]
	Broccoli	Clinical	500 g/d broccoli [4]
CYP2B1	Rosemary	In vivo	Diet of 0.5% rosemary extract [37]
	Garlic	In vivo	0.5 and 2.0 mmol/kg diallyl sulfide, or about 75 and 300 mg, respectively [9]
CYP2B2	Rosemary	In vivo	Diet of 0.5% rosemary extract [37]
CYP2E1	Fish oil	In vivo	20.5 g/kg fish oil [36]: note high dose used
	Chicory root	In vivo	Diet of 10% dried chicory root [41]