Bilberry: How It Works, Evidence & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team
Bilberry is a berry rich in antioxidant anthocyanins, traditionally linked to eye and circulation support. It appears in vision and brain formulas.
What is Bilberry?
Bilberry is a relative of the blueberry, prized for its deep-blue anthocyanin pigments, which are studied as antioxidants.
How Bilberry works
Its anthocyanins act as antioxidants and are thought to support small blood vessels and circulation, the basis for its traditional use for eyes.
What the evidence says
- Research has examined bilberry anthocyanins for antioxidant and circulatory effects, with limited but ongoing study. (PubMed research)
How much do studies use?
Extracts are often standardised for anthocyanin content; studied doses vary. Follow label amounts.
Safety and side effects
Considered safe as a food and generally well tolerated as an extract.
Who should avoid Bilberry?
As with other antioxidant extracts, people on blood thinners or who are pregnant should check with a doctor.
Frequently asked questions
Is bilberry good for eyes?
It has a traditional reputation for eye support, though modern evidence is limited. It is nutritional support, not a treatment for eye disease.
Is bilberry the same as blueberry?
They are close relatives. Bilberry has a higher concentration of certain anthocyanin pigments.