Thousands of phytochemicals have been identified, a huge number of them categorized as polyphenols. This chart maps just a small part of the lineup. Many of these have potential antioxidant, anti-cancer, and cardio-protective effects.

SUBSTANCE		SAMPLE FOOD SOURCES
Indoles		Cruciferous vegetables, such as broccoli, cabbage, kale
Isothiocyanates (such as sulforaphane)		Cruciferous vegetables
Phytosterols		Soybeans, other beans, cucumbers
Allyl sulfides and other organosulfurs		Garlic, onions, leeks
Saponins		Garlic, onions, licorice, legumes, nuts, whole grains
Protease inhibitors		Soybeans, other beans, many grains
Monoterpenes (including limonoids)		Oranges, lemons, grapefruit
Capsaicin		Chili peppers
Carotenoids (lycopene,beta carotene, etc.)		Orange, red, yellow fruits, many green vegetables
Polyphenols
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Flavonoids
Isoflavones		Soybeans, other legumes, licorice
Catechins		Tea
Anthocyanidins		Red, blue, and purple plants, such as eggplant, blood oranges, blueberries
Quercetin		Apples, onions, tea, citrus
Naringenin/hesperetin		Citrus
Phenolic acids (ellagic acid, gallic acid, etc.)		Strawberries, raspberries, grapes, apples
Lignans		Flaxseed, berries, whole grains, licorice
Resveratrol		Grapes, wine, peanuts