- What other names is Bilberry known by?
- What is Bilberry?
- How does Bilberry work?
- Are there safety concerns?
- Are there any interactions with medications?
- Dosing considerations for Bilberry.
Bilberry is used for improving eyesight, including night vision. In fact, during World War II, British pilots in the Royal Air Force ate bilberry jam to improve their night vision, but later research showed it probably didn't help. Bilberry is also used for treating eye conditions such as cataracts and disorders of the retina. There is some evidence that bilberry may help retinal disorders.
Some people use bilberry for conditions of the heart and blood vessels including hardening of the arteries (atherosclerosis), varicose veins, decreased blood flow in the veins, and chest pain.
Bilberry is also used for chronic fatigue syndrome (CFS), hemorrhoids, diabetes, osteoarthritis, gout, skin infections, gastrointestinal (GI) disorders, kidney disease, and urinary tract infections (UTIs).
It is sometimes applied directly to the inside of the mouth for mild mouth and throat soreness.
Possibly Effective for...
- Circulation problems (chronic venous insufficiency). Early research suggests that taking bilberry extract that contains 173 mg of certain chemicals, called anthocyanins, daily for 30 days reduces symptoms associated with a circulation problem called chronic venous insufficiency (CVI). Other research suggests that taking 100-480 mg of bilberry anthocyanins daily for up to 6 months might improve swelling, pain, bruising, and burning associated with CVI.
- Problems with the retina of the eye in people with diabetes or high blood pressure (retinopathy). Eating bilberry fruit containing a high amount of a certain chemical, called anthocyanoside, seems to improve retina problems associated with diabetes or high blood pressure.
Possibly Ineffective for...
- Improving night vision. There is contradictory evidence about the effectiveness of bilberry for improving night vision. However, most evidence to date suggests that bilberry is not effective for improving night vision.
Insufficient Evidence to Rate Effectiveness for...
- Diabetes. A study in men with type 2 diabetes suggests consuming a capsule of an extract of bilberry (Mirotoselect), prior to taking an oral glucose tolerance test, can lower glucose levels in the blood.
- Painful menstruation (dysmenorrhea). Early research suggests that a specific bilberry product (Tegens), taken twice daily 3 days before the beginning of the period and continuing for 8 days for a least two consecutive menstrual cycles, reduces pain, nausea, vomiting and headache in women with painful menstruation.
- Eye strain. Early research suggests that taking a combination of fish oil, lutein, and bilberry extract daily for 4 weeks reduces dry eye, lower back pain, shoulder stiffness, and stuffy head in people with eye strain.
- Glaucoma. Early research suggests that taking 60 mg of a bilberry chemical, called anthocyanin, twice daily for at least 12 months improves vision in people with glaucoma.
- Prediabetes. Some research suggest that eating a diet high in whole grains, fatty fish, and bilberries three times daily for 12 weeks reduces blood sugar in people with prediabetes. However, it is not clear if bilberry or other parts of this diet cause the reduction in blood sugar.
- High pressure in the eye. Early research suggest that taking a specific product containing 80 mg of bilberry extract (Mirtogenol) and 40 mg of French maritime pine bark extract (Pycnogenol) twice daily for 6 months can reduce eye pressure and improve blood flow to the eye in people with high pressure in the eye.
- Irritable bowel syndrome (IBS). Early research suggests that consuming a combination of agrimony, cinnamon, bilberry fruit, and slippery elm bark slightly increases the number of bowel movements and reduces stomach pain, bloating, and flatulence in people with IBS.
- Metabolic syndrome. Some evidence suggests that eating 400 grams of fresh bilberries daily does not affect body weight, blood sugar, or cholesterol in people with metabolic syndrome.
- Difficulty seeing far away (nearsighted, myopia). Eating fermented bilberry seems to improve the ability to focus and see objects far away.
- Ulcerative colitis. Some early research shows that consuming 160 grams of bilberry daily for 6 weeks induces disease remission.
- Weight loss. Early research suggests that eating 100 grams of frozen, whole bilberries daily for 33-35 days decreases weight and waist circumference in overweight and obese women.
- Arthritis (osteoarthritis).
- Chest pain (angina).
- Chronic fatigue syndrome.
- Hardening of the arteries (atherosclerosis).
- Skin problems.
- Urinary tract problems.
- Varicose veins.
- Other conditions.
Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).
Next: How does Bilberry work?
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