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Bilberry Side Effects, Interactions and Warnings

Interferes with iron absorption when taken internally.

The use of fresh bilberries can cause diarrhea in some individuals.

If the leaves are consumed over a long period of time, they can be poisonous. Do not exceed the recommended dose.

Bilberry can have an effect on blood sugar levels and blood pressure.
- Acta Diabetol. 2004 Sep;41(3):91-8. -- What do herbalists suggest to diabetic patients in order to improve glycemic control? Evaluation of scientific evidence and potential risks. -- Cicero AF, Derosa G, Gaddi A.

Bilberry possesses antiplatelet activity which can interact with aspirin and related medications.
- J Clin Pharm Ther. 2002 Dec;27(6):391-401. -- Herbal medication: potential for adverse interactions with analgesic drugs. -- Abebe W.

last update: March 2009

This information is not intended to be a substitute for professional medical advice. You should not use this material to diagnose or treat a health condition or disease without consulting with your healthcare provider.
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