Pick a handful of berries in a Finnish forest in late July and your fingers will tell you what you are holding. Bilberries stain everything they touch a deep violet; cultivated highbush blueberries usually do not. The colour difference reflects a real botanical and compositional distinction between two berries that English speakers often treat as interchangeable.
Bilberry is the berry behind much of the traditional eye-health lore and many bilberry-extract supplements. It typically contains a higher concentration of anthocyanins than cultivated highbush blueberry, although measured levels vary with variety, growing conditions, ripeness, storage and analytical method. This guide explains the differences and gives a cautious account of what the eye-health evidence does and does not support.
The short answer
Bilberry (Vaccinium myrtillus) is the small Northern European forest berry, purple throughout and strongly flavoured. Highbush blueberry (Vaccinium corymbosum) is the larger cultivated North American species, usually with pale flesh and a milder taste. Both are nutritious berries. Bilberry generally contains more anthocyanin pigment, while total polyphenol and antioxidant measurements depend on the sample and method used.
Bilberry vs blueberry: the full comparison
Botany and origin
Bilberries grow on low shrubs across boreal and temperate forests in Europe. Most commercial bilberries are still collected from wild stands, although cultivation and breeding work exists and it is too absolute to describe the species as impossible to farm. In Finland, bilberry is mustikka. Finland's everyman's rights allow people to pick wild berries in many natural areas, provided they keep away from private yards, respect protected-area rules and do not cause disturbance or damage.
The cut test: flesh colour
Cut a highbush blueberry and the flesh is usually pale green-white. Cut a ripe bilberry and the flesh is red-purple throughout. The pigment in both skin and flesh is the visible reason bilberry stains so readily.
Taste and kitchen behaviour
Bilberries are smaller, softer and more aromatic, with an intense tart-sweet flavour. They collapse readily in cooking, releasing colour and flavour into Finnish bilberry pie (mustikkapiirakka), soups and sauces. Highbush blueberries are generally firmer and milder and hold their shape better.
Nutrition and anthocyanins
Both berries provide fibre and a range of vitamins, minerals and polyphenols. Bilberries commonly contain higher anthocyanin concentrations than cultivated highbush blueberries because the pigment extends through the flesh. The exact difference is not fixed: published values vary substantially between samples, seasons, origins and laboratory methods.
Why anthocyanins matter
Anthocyanins are blue, red and violet plant pigments belonging to the polyphenol family. They are widely studied in laboratory, dietary and clinical research. Laboratory antioxidant activity is not the same as a demonstrated health outcome in people, so anthocyanin-rich foods are best presented as part of a varied diet rather than as treatments.
Bilberry and eye health: what the evidence says
Bilberry's eye reputation is often linked to a story that Royal Air Force pilots ate bilberry jam to improve night vision during the Second World War. The story is memorable, but reliable historical support is weak.
A systematic review of placebo-controlled trials found that the better-designed studies did not support improved normal night vision in healthy people. Other ocular uses continue to be studied, but evidence is not strong enough to promise that bilberry alone improves vision or treats an eye condition.
Bilberry is often included in eye-health formulas alongside lutein, zeaxanthin and zinc. These ingredients should not be treated as interchangeable. Zinc has an EU-authorised claim because it contributes to the maintenance of normal vision when the product meets the conditions of use. Lutein and zeaxanthin are carotenoids naturally present in the macula, but their presence does not automatically authorise a broad vision claim. Compare the complete formula, declared amounts and authorised wording rather than assuming that bilberry itself carries the claim.
You can compare relevant formulas in our eye health collection.
How to use bilberry
Fresh and frozen berries
In Finland, fresh bilberries are used in porridge, pancakes, pies and desserts. They also freeze well, although texture softens after thawing.
Powder, dried berries and juice
Freeze-dried powder can be a practical year-round format. Product composition depends on whether it contains whole berries, juice solids or another raw material, so check the ingredient list and nutrition information. Powder adds colour and berry flavour to smoothies, yoghurt and porridge.
Bilberry extracts
Extract supplements often declare a standardised anthocyanin content. That makes products easier to compare, but standardisation does not by itself prove a clinical benefit. Check the daily amount, extract specification and any companion nutrients.
Wild origin without overstatement
Much of the bilberry sold from Finland and the Nordic region is wild-collected from natural forests. That is a meaningful sourcing characteristic when it is documented. It does not mean every bilberry product is Finnish, pesticide-free or identical in composition. Check the individual product page for origin, organic certification and processing details.
Its red forest-floor neighbour has a different culinary role; see our guide to lingonberry.
Frequently asked questions about bilberry
Are bilberries and blueberries the same?
No. They are related species, but bilberry (Vaccinium myrtillus) is generally smaller and purple throughout, while common cultivated highbush blueberry (Vaccinium corymbosum) is larger and usually pale inside.
Which contains more antioxidants?
Bilberries typically contain more anthocyanins than cultivated highbush blueberries. It is less precise to declare one berry universally higher in “antioxidants”, because total values depend on variety, ripeness, processing and the laboratory test used.
Is bilberry good for the eyes?
Bilberry has a long tradition of eye-related use, but rigorous trials do not support improved normal night vision in healthy people. Product-specific claims should be based on the complete formula and authorised nutrient claims.
What is bilberry called in Finland?
Mustikka. The wild berry commonly picked in Finnish forests is bilberry rather than cultivated highbush blueberry.
Can bilberries be cultivated?
Cultivation and breeding work exists, but bilberry remains difficult to grow and harvest commercially. Most Nordic supply still comes from wild collection.
The darker berry is worth knowing
Blueberries and bilberries are both useful foods, but they are not identical. Bilberry's purple flesh, intense flavour and typically higher anthocyanin concentration explain its distinctive culinary and supplement roles. The evidence supports accurate comparison, not miracle claims.
Sources and further reading
- Systematic review of bilberry anthocyanosides and night vision
- Metsähallitus guidance on berry picking and protected areas
- European Commission EU Register of nutrition and health claims
Taste the difference: explore our bilberry collection for Finnish bilberry powders, dried berries and juices. If eye health brought you here, compare complete formulas in our eye health collection.
This article is for general information only and is not medical advice. Food supplements are not a substitute for a varied diet or a healthy lifestyle.