(b).

Enzyme	Food, beverage, or bioactive compounds  Food sources in italics	Type of study	Dosages used and references
CYP3A	Green tea	In vivo	45 mL/d/rat (avg. 150 g animal weight) green tea [33]  400 mg/kg green tea extract [71]  100 mg/kg/d green tea extract [56]
	Black tea	In vivo	54 mL/d/rat (avg. 150 g animal weight) black tea [33]
	Quercetin  Apple, apricot, blueberries, yellow onion, kale, alfalfa sprouts, green beans, broccoli, black tea, and chili powder [47, 48]	In vivo	10 and 20 mg/kg [72]
CYP3A2	Cruciferous vegetables	In vivo	12 mg/kg/d sulforaphane [57]
	Grapefruit	Clinical	200 mL grapefruit juice 3 times daily [74]
	Resveratrol  Grapes, wine, peanuts, soy, and itadori tea [32]	Clinical	1 g/d resveratrol [28]: note high dose used
CYP3A4	Garden cress	Clinical	7.5 g twice daily dose of garden cress seed powder [55]
	Soybean	In vivo	100 mg/kg soybean extract [7]
	Kale	In vivo	2 g/kg/d kale, as freeze-dried kale drink [51]
	Myricetin  Onions, berries, grapes, and red wine [58]	In vivo	0.4, 2, and 8 mg/kg myricetin [58]