Contents
Nutrition Fundamentals
How to Understand Calories
How to Understand Nutrients
The Right Balance of Nutrients
The Food Groups
How to Eat a Nutritious Diet Based on the Food Groups
Functional Foods
Healthy Eating at Home
How to Read Nutrition Labels
Healthy Eating Away from Home
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Functional Foods
As nutrition research advances, scientists continue to find new compounds that play an active role in our overall well-being. Though these compounds don’t contribute to nutrition since they aren’t digested, they do appear to fight disease and promote proper body function. For instance, antioxidants are molecules contained in some foods that interact with and limit the damage caused by free radicals, charged molecules that can harm DNA and cell membranes.
Foods containing helpful compounds such as antioxidants are called functional foods because they’re useful in treating or preventing specific bodily conditions and illnesses.
Popular Functional Foods
The following table lists the most popular functional food compounds, their sources, and their possible health benefits. Not all of the health benefits these foods provide have been scientifically proven, however. Foods that make definitive health claims must receive FDA (Food and Drug Administration) approval. Functional food compounds that have received FDA approval for their health benefits are marked with the phrase “FDA approved” below.
Class |
Sources |
Potential Health Benefits |
||
Carotenoids |
Natural pigments found in plants, such as carrots, dark green vegetables (kale, spinach, collards), tomatoes, tomato products |
Neutralize free radicals,
support healthy vision, help protect against lung, skin, and gastrointestinal cancers |
||
Flavonoids |
Berries, cherries, red grapes, citrus, tea, chocolate, wine, cinnamon |
Neutralize free radicals, help maintain heart health, defend against urinary tract infections |
||
Isothiocyanates |
Broccoli, cabbage, cauliflower, kale |
Improve defenses against cancer by eliminating carcinogens |
||
Phenols |
Apples, citrus, pears |
Improve defenses against free radicals, maintain healthy heart and vision |
||
|
Plant stanols and sterols
(FDA approved)
|
Corn, soy products, wheat |
Reduce risk of coronary heart disease |
||
Prebiotics and probiotics |
Live bacteria found in yogurt (yogurts must have live active cultures), fermented foods, peas, and beans |
Improve gastrointestinal health and calcium absorption, fight yeast infections |
||
Phytoestrogens |
Soy-based foods (tofu, soy milk, roasted soybeans),
flaxseed, rye, alfalfa sprouts |
Preserve bone health, immune system function, and menopausal health |
||
|
Soy protein
(FDA approved)
|
Soybeans, soy-based foods |
Reduces risk of coronary heart disease |
||
Sulfides and thiols |
Garlic, leeks, onions, scallions |
Maintain healthy heart and immune system function |
| Acknowledgments & Disclaimer |






