Flavonoids are a flavorful way to boost heart and brain health

By Laura Williamson, American Heart Association News

Science Photo Library, Getty Images
(Science Photo Library, Getty Images)

Lea en español

What do blueberries, spinach and dark chocolate have in common?

They're all rich in flavonoids, the chemical compounds found in plants that give them color – and medicinal powers. Research shows flavonoids provide a wide range of health benefits, from fighting cancer and lowering the risk for heart disease to preserving brain function. They've even been used to fight wrinkles.

"The key reason flavonoids are good for us is they have anti-inflammatory effects and are antioxidants," said Kristina Petersen, an assistant professor in the department of nutritional sciences at Texas Tech University in Lubbock.

Antioxidants help fight inflammation and aging. Flavonoids also have properties that could help prevent blood clots. And a study published last year in the American Heart Association journal Hypertension suggests flavonoids in foods such as berries, red wine, apples and pears may influence gut bacteria in a way that lowers blood pressure.

Because of this, flavonoids play a central role in the Mediterranean, DASH and MIND diets, the eating patterns most recommended by heart and brain health experts. While there are some differences, all three place a heavy focus on flavonoid-rich fruits, vegetables, nuts and beans.

But most people in the U.S. aren't getting enough flavonoids, largely because they don't eat the recommended daily allowance of fruits and vegetables. Federal dietary guidelines recommend adults eat 1.5-2 cups of fruit each day and 3-4 cups of vegetables. But only 1 in 10 U.S. adults eat that many vegetables and only 1 in 8 eat a sufficient amount of fruit, according to data from the Centers for Disease Control and Prevention.

The good news is, flavonoids are found in such a wide range of fruits, vegetables and other foods that it shouldn't be hard to fit them into your diet, Petersen said. They're found in berries of all kinds, cherries, apples, grapes, leeks and leafy green vegetables such as spinach, romaine lettuce and kale. Like garlic and onions? You'll find them there as well. Soybeans? They've got them, too.

Petersen recommends eating a wide range of flavonoid-rich foods for the greatest nutritional value. "The goal is to eat a variety of fruits and vegetables of different colors. Eat a rainbow," she said.

If you're not used to eating a lot of produce, you can build it into your diet slowly, she said.

"Eat one more piece of fruit per day," Petersen said. "Put one more vegetable on your plate at dinner time. Trying to overhaul your entire diet can be difficult, so start by making small changes."

Eating fresh, whole foods is the best way to get the flavonoids you need, she said. But it's not the only way.

If fresh fruits aren't available, frozen berry mixes are a good alternative, Peterson said. Fruits and vegetables that are flash frozen retain high levels of nutrients, store easily and can add variety to the plate even when out of season.

You can also drink flavonoids. Beverages such as red wine and tea, especially black or green tea, are good sources. Fruits and vegetables can be squeezed into juices or smoothies as well, but Petersen said juicing is less than ideal because it removes a lot of beneficial fiber.

However, she said, "if that's the only way you can get them into your diet, then do it."

And, of course, dark chocolate is a sweet way to add flavonoids to your day.

There's no need to force yourself to eat foods you don't like in order to get your flavonoid fix. "We never have success in telling people to eat things they don't like," Petersen said. "There are so many you can choose from," so eat the ones you like. And don't be afraid to try new ones.

Anyone already following the Mediterranean, DASH or MIND diets – or any high-quality plant-based diet – shouldn't have to worry.

"The goal is to consume a healthy dietary pattern," Petersen said. "And if we're doing that, we're going to be consuming enough flavonoids."

If you have questions or comments about this story, please email [email protected].


American Heart Association News Stories

American Heart Association News covers heart disease, stroke and related health issues. Not all views expressed in American Heart Association News stories reflect the official position of the American Heart Association. Statements, conclusions, accuracy and reliability of studies published in American Heart Association scientific journals or presented at American Heart Association scientific meetings are solely those of the study authors and do not necessarily reflect the American Heart Association’s official guidance, policies or positions.

Copyright is owned or held by the American Heart Association, Inc., and all rights are reserved. Permission is granted, at no cost and without need for further request, for individuals, media outlets, and non-commercial education and awareness efforts to link to, quote, excerpt from or reprint these stories in any medium as long as no text is altered and proper attribution is made to American Heart Association News.

Other uses, including educational products or services sold for profit, must comply with the American Heart Association’s Copyright Permission Guidelines. See full terms of use. These stories may not be used to promote or endorse a commercial product or service.

HEALTH CARE DISCLAIMER: This site and its services do not constitute the practice of medical advice, diagnosis or treatment. Always talk to your health care provider for diagnosis and treatment, including your specific medical needs. If you have or suspect that you have a medical problem or condition, please contact a qualified health care professional immediately. If you are in the United States and experiencing a medical emergency, call 911 or call for emergency medical help immediately.