Bilberries (Vaccinium myrtillus) are small, blue berries native to Northern Europe. They’re often referred to as European blueberries, as they’re very similar in appearance to North American blueberries.
Bilberries have purportedly been used for medicinal purposes since the Middle Ages, while their juice was traditionally used to dye linen and paper.
Nowadays, they’re linked to various health benefits, from improved vision to lower blood sugar and cholesterol levels.