What Eating Blueberries Every Day Does to Your Body, According to Nutrition Experts

Blueberries might be small, but their benefits are mighty. In fact, they're some of the healthiest foods you can eat, earning them superfood status. The best part? They can be incorporated into myriad dishes, making it easy to eat blueberries every day.

Even better, doing that gets two thumbs up from registered dietitians. We asked them to explain what happens when you consume blueberries daily and to share the recommended amount to eat for optimal benefits.

What Happens When You Eat Blueberries

These are the effects of eating blueberries daily, as outlined by dietitians.

Improves Brain Function

By adding blueberries to your daily diet, your brain function will flourish. "Blueberries are rich in anthocyanins, a type of flavonoid that gives them their deep blue color. These compounds act as antioxidants, helping protect brain cells from oxidative stress and inflammation, both of which are linked to cognitive decline," says Diane Lindsay-Adler, RDN, CDN.

Anthocyanins may also support healthy blood flow to the brain, which helps optimize communication between brain cells and supports memory and cognitive performance over time, Lindsay-Adler says.

Helps Digestive Health

"Blueberries are a gentle but powerful ally for gut health," says Amanda C. Sawyer, MS, RD, LDN. "One cup provides about 3.6 grams of soluble fiber, which feeds the beneficial bacteria living in the gastrointestinal tract and supports healthy digestion," she notes.

Blueberries contain antioxidant polyphenols, which act as fuel for beneficial gut bacteria in the large intestine, says Lindsay-Adler. "These compounds help promote a more diverse and balanced microbiome, which plays a role in digestion, immune function, and even metabolic health," she says.

Promotes Heart Health

Another benefit of eating blueberries every day is improved heart health. "Blueberries contain anthocyanins, fiber, and other polyphenols that support cardiovascular health by improving blood vessel function and reducing oxidative stress," says Lindsay-Adler. Specifically, the soluble fiber in blueberries helps lower cholesterol levels, particularly LDL ("bad") cholesterol, according to Sawyer.

Lowers Disease Risk

As a rich source of antioxidants, blueberries can reduce the risk of chronic disease. According to Sawyer, the key antioxidant compounds in blueberries include anthocyanins, vitamin C, and vitamin E. In the anthocyanin department, "blueberries contain 25 known varieties,  including malvidin, delphinidin, petunidin, cyanidin, and peonidin, each contributing to their anti-inflammatory and antioxidant power," says Sawyer. Meanwhile, both vitamin C and vitamin E help scavenge free radicals and lower oxidative stress, which is linked to chronic disease, Sawyer says. 

Regulates Blood Sugar

"Despite their natural sweetness, blueberries have a relatively low glycemic impact due to their fiber and polyphenol content," says Lindsay-Adler. (For context, a food's glycemic index indicates how quickly it increases blood sugar. A lower number points to a slower rise.) "Fiber slows glucose absorption, helping prevent blood sugar spikes. Polyphenols may also support insulin sensitivity and glucose metabolism," Lindsay-Adler says.

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How Many Blueberries to Eat

There isn't a single universal "prescription" for daily blueberry intake, but research shows that eating 1/2 to 2 cups of blueberries per day can provide meaningful health benefits, says Sawyer. Remember that blueberries count toward your daily fruit intake of two servings per day, as recommended by the Dietary Guidelines for Americans. 

If you don't usually eat a lot of fiber, increase your blueberry intake slowly. Since blueberries contain fiber, eating too many too quickly can cause gastrointestinal discomfort. Otherwise, for most people, blueberries are safe to eat every day, says Lindsay-Adler. 

How to Eat Blueberries

There are many ways to enjoy blueberries. Simply eat them as a snack, spoon them over oatmeal or yogurt, blend them into smoothies, or toss them into salads, says Sawyer. You can also fold blueberries into muffins, pancakes, or other baked goods, or stir them into trail mix with nuts and seeds.