Small, sweet and deeply coloured, blueberries are among the most studied fruits in nutrition research. Their blue-purple colour comes from anthocyanins, a group of plant compounds with antioxidant and anti-inflammatory properties. Here is what the evidence suggests.
Blueberry Nutrition Facts
One cup (about 148 g) of raw blueberries provides roughly:
| Nutrient | Amount (approx.) |
|---|---|
| Calories | 84 |
| Carbohydrate | 21 g (15 g sugar) |
| Fibre | 3.6 g |
| Vitamin C | 14 mg (about 16% of daily needs) |
| Vitamin K | 29 mcg (about 24%) |
| Manganese | 0.5 mg (about 22%) |
8 Potential Health Benefits
1. Rich in antioxidants
Blueberries rank among the highest antioxidant fruits, helping neutralise free radicals that contribute to cell damage and ageing.
2. May support brain health
Observational research and small trials suggest regular berry intake is associated with slower cognitive decline, and trials in older adults have found improvements in memory and executive function after several weeks of blueberry supplementation.
3. Heart health
Large cohort studies link higher anthocyanin intake with lower risk of heart attacks and hypertension. Trials show small reductions in blood pressure and improved blood vessel function with daily blueberries.
4. Blood sugar support
Despite their sweetness, blueberries have a low to moderate glycaemic load, and some studies show improved insulin sensitivity in people with insulin resistance.
5. Bone and skin support
Vitamin K supports bone health and vitamin C is needed for collagen formation in skin.
6. Exercise recovery
Small studies suggest blueberries may reduce muscle soreness and speed recovery after intense exercise.
7. Gut health
Fibre and polyphenols feed beneficial gut bacteria.
8. Urinary tract support
Cranberries are better known, but blueberries also contain compounds that may reduce bacterial adhesion in the urinary tract. Evidence is limited and they are not a treatment for infection.
How Many Should You Eat?
Most research uses about half to one cup (75 to 150 g) per day. Fresh and frozen berries are both good choices, and frozen ones are often cheaper and picked at peak ripeness.
Easy Ways to Eat Blueberries
- Stir into oatmeal, curd or overnight oats
- Blend into smoothies with spinach and yogurt
- Add to salads with nuts and feta
- Freeze and eat as a cold snack
- Bake into whole grain muffins or pancakes
- Top chia pudding or cereals
Things to Keep in Mind
- Blueberries are safe for most people, but large amounts can cause digestive upset.
- Vitamin K content matters if you take warfarin, so keep your intake consistent and talk to your doctor.
- Choose whole berries rather than sweetened juices or jams for the full benefit.
- Wash fresh berries before eating.
The Bottom Line
Blueberries are a delicious, low-calorie way to add antioxidants and fibre to your day. While no single food is a cure-all, a handful daily as part of a varied diet is a sensible habit.
This article is for general education and is not a substitute for personalised advice from a registered dietitian or doctor.