Eat These Immune-Boosting Foods in Flu Season

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Scientists have discovered thousands of healthy compounds in foods called antioxidants and phytochemicals that help protect our bodies from a host of diseases and conditions. Many of these compounds also provide the pigments that make plants a certain color. When you eat a “rainbow” diet full of plenty of colorful fruits, vegetables, beans and grains, you strengthen your immune system to help fight disease. Here are some of the key plant-based compounds that can help keep you cold and flu-free this season.

Anthocyanins

Found in: Blueberries, blackberries, cranberries, strawberries, kiwi, plum, grapes, red cabbage, eggplant
Colors: Blue, purple, red
Among the strongest anti-inflammatory phytochemicals for strengthening the immune system, anthrocyanins are antioxidants that reduce inflammation

Carotenoids

Found in: Carrots, winter squash, sweet potato, cantaloupe, pumpkin, citrus fruits, turnips, cauliflower, papaya, apricots
Color: Yellow, Orange, White
Rich in antioxidants, carotenoids enhance immune function, helping your body resist infection. Carotenoids are also important for eye health and good vision. And they may help slow the aging process, inhibit cancer cell growth, and improve lung function.

Allium

Found in: Onion, garlic, leek, chives, scallion
Color: White
The phytochemical allium helps keep your immune system healthy. Research shows allium also helps control hypertension and cholesterol and  may reduce risk of certain cancers.

Catechins and Tannins

Found in: Black or green tea, wine, berries, cranberries, cocoa and chocolate
Color:  Red, green, and brown
Catechins and tannins are antioxidant phytochemicals that boost immune health, improve urinary tract health, and appear to reduce your risk of cancer and heart disease.

Polyphenols

Found in: Apples, berries, cherries, grapes. kiwi, pomegranate, also lentils, peanuts, pecans, walnuts and other nuts and the spice turmeric.
Color:  Red, green, and white
Polyphenols are antioxidant powerhouses, which have been studied for their ability to lower cholesterol and reduce heart disease risk, prevent eye disease, strengthen the immune system, and decrease cancer risk.

Terpenes

Found in: Citrus fruits, apples, pears, cherries and many other fruits, also herbs such as sage, rosemary and bay.
Color: Green, yellow, orange
Terpenes are antioxidants that boost immune function and decrease inflammation. According to the American Institute for Cancer Research, terpenes may prevent or slow the growth of cancer cells.

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