The effectiveness of bilberry capsules has not been proven. To keep your eyes healthy, you're better off eating fruits and vegetables rich in carotenoids. If you want to try bilberry capsules for diarrhea, there's probably no harm in it. Blueberries are among the favorite fruits of nutritionists. They are also rich in chemicals that have been shown to have anticancer effects in lab animals.
Bilberries are a very close European relative of blueberries.
They have a purple interior, unlike blueberries, which are white inside. Blueberries, bilberries, cranberries, and lingonberries all belong to the same genus, Vaccinium. At most pharmacies and health-food stores you can now buy a compound extracted from bilberries in capsule form, sometimes combined with other herbs. Many claims are made for bilberry leaves and fruit. Bilberry tea has been used for hundreds of years to treat almost everything.