It’s rare to try a new healthy habit and enjoy it so much that you make it part of your routine going forward. But that’s what happened when I started eating a serving of blueberries every day for a week. It turns out blueberries might be the perfect health food because they’re delicious, versatile, and packed with research-backed benefits.
Blueberry health benefits
“Blueberries have long been associated with supporting health,” says Anne VanBeber, a professor of nutritional sciences. Research suggests that eating berries and other anthocyanin-rich foods may support cardiovascular and metabolic health. There is also promising but still early evidence for possible benefits to vascular function, cognition, gut microbes and exercise recovery. However, blueberries should not be described as proven to prevent heart disease, diabetes, cognitive decline or high blood pressure.
A serving of blueberries—about 150g, or roughly one cup—provides fibre, vitamin C, vitamin K and manganese. It contains approximately 3.5–4g of fibre, equivalent to around 12–13% of the UK adult fibre target of 30g per day. This is higher than the US example of 25g per day for women aged 19–50. Adding blueberries to porridge, yoghurt or cereal can therefore make a useful contribution to daily fibre intake, although fibre should come from a variety of foods, including wholegrains, pulses, vegetables, nuts and seeds.
Blueberries also contain anthocyanins—red, purple and blue plant pigments with antioxidant and anti-inflammatory activity in laboratory studies. Human research suggests they may modestly support blood-vessel function and some markers of cardiometabolic health, but it has not established that blueberries directly prevent heart attacks, high blood pressure or cognitive decline. Their fibre and polyphenols may also interact with gut bacteria, although claims about improved immunity and gut health remain preliminary.
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Blueberries may also be useful around exercise. A small randomised study found that a blueberry smoothie consumed before and after strenuous exercise was associated with faster recovery of muscle strength, but the study involved only 10 women, so stronger evidence is needed before making firm claims about exercise recovery.
In the UK, 80g of fresh or frozen fruit counts as one portion towards the NHS 5-a-day recommendation, so 150g of blueberries is roughly two portions. Whole blueberries are also suitable for people with diabetes: Diabetes UK advises that whole fruit can form part of a healthy diet, while juice and smoothies are easier to consume quickly and contain less intact fibre.
What happened when I ate blueberries every day
I often began with breakfast, using blueberries to boost my nutrient intake before the day got away from me. I’d pile a cup of freshly washed blueberries on top of cold cereal (Cheerios or Nature’s Path Organic Mesa Sunrise) or hot cereal like oats. Sometimes I ate fresh blueberries with plain or lightly sweetened yogurt at lunchtime.
On other days, I relied on frozen blueberries, a convenient alternative to fresh berries that work great in between grocery runs. “It’s nice to have a bag of wild blueberries in the freezer because then they are readily available to add to a lot of dishes,” says VanBeber.
Frozen berries also tend to be cheaper than fresh ones. At my favourite supermarket, a 300g container of blueberries (about two servings) cost about £3.30, but about 10 servings of frozen wild blueberries cost about £8.35. On top of convenience and price, that particular frozen option comes with another benefit: Wild blueberries are smaller and contain more anthocyanins per serving than regular blueberries, says VanBeber.
Sometimes during the week I added frozen blueberries to a smoothie with other fruits and vegetables, seeds, and protein powder. Or I gently thawed them and ate them with protein-rich cottage cheese.
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Fresh or frozen, I find the flavour of blueberries delightful—a sweetness that might have curbed my desire for sweet snacks later in the day. (Surprisingly, I found myself wanting less chocolate than usual.)
Plus, there’s a nice versatility that comes with blueberries. Some healthy foods require a lot of prep work or taste just OK, but washing or thawing berries was quick and simple, and eating them was a joy. What’s more, the blueberries paired well with foods I eat on the reg so adding them to my diet never really felt like a chore, although I did make one extra grocery run during the week to stock up on more berries. Since I’m not the only blueberry fan in my household, I had to monitor our supply and make sure I didn’t deplete our fresh and frozen stashes of blueberries before replacing them.
Overall, this experiment was a success. I felt sharp and strong during the week with no noticeable negative effects. Eating a cup of berries in one sitting didn’t seem to affect my digestion in any perceptible way. I intend to continue eating blueberries every day, or at least several times per week.
How to eat more blueberries
Want to start your own daily blueberry habit? Use these tips to incorporate blueberries into your diet, courtesy of VanBeber:
- Add blueberries to oatmeal bowls, yoghurt, chia puddings, salsas, or cake and bread batters.
- Blend blueberries into hummus, smoothies, vinaigrette salad dressings, or sauce toppings for meat, fish, or poultry.
- Sprinkle blueberries onto salads.
The bottom line
Adding blueberries to my daily routine was simple, healthy, and delicious. You can incorporate blueberries into many of the foods you already eat to give your meals a boost of heart-healthy, brain-protecting nutrients. To stick with the habit without breaking your budget, try keeping frozen blueberries in the freezer.
Julie Stewart is a writer, editor and content strategist with over a decade of experience translating complex topics — health and medicine, science and engineering — into engaging, accessible stories. Her work has appeared in publications like Men’s Health, Women’s Health, AARP The Magazine, EatingWell and Prevention, and she has also led strategic communications for a top engineering college and a global oncology company.