There is a lack of evidence to indicate that bilberry fruit or leaves have an effect on any health condition.
Bilberry fruit is generally thought to be safe when consumed in amounts typically found in foods, or at recommended doses for a short duration. The safety of prolonged use of the fruit has not been studied.
Prolonged use or high doses of the leaf can cause toxic side effects and should be avoided.
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.