The bilberry's blue-black berry, which is creamy white inside, has been valued as a food since prehistoric times. Commonly referred to as "European blueberry," it is famed as a filling for pies, and for use in cobblers, jams, and other recipes.
In addition, for at least one thousand years, European herbalists have also recommended the plant's fruits and leaves for medicinal purposes, treating a variety of complaints with a strong, boiled tea made from the plant. Urinary tract infections, kidney stones, and diarrhea are just a few of the ailments for which bilberry has been used.
Bilberry's modern reputation as a healing plant was sparked during World War II, when British Royal Air Force (RAF) pilots noticed that their night vision was sharper than usual whenever they ate bilberry preserves before starting out on their evening bombing raids. Subsequent research revealed that bilberries are powerful antioxidants, capable of protecting cells in the eye and other parts of the body against damage from unstable oxygen molecules called free radicals.
Today, bilberry ranks among the most popular of supplements for maintaining healthy vision and for treating various vision disorders, including poor night vision, cataracts, and macular degeneration.
Health Benefits
Researchers intrigued by the improved night vision of the bilberry-eating RAF pilots eventually identified compounds in the berry called anthocyanosides. These substances appear to fortify blood vessel walls, improving blood flow to the tiny blood vessels that keep eyes healthy, as well as to larger blood vessels that help maintain good circulation throughout the body. Anthocyanosides also appear to strengthen collagen, the protein that provides support to healthy connective tissue.
The other important healing substance in bilberry fruits--astringent compounds called tannins--help treat such ailments as diarrhea, sore throat, and inflammations in the mouth. Germany health authorities approve of bilberry fruit for mild cases of diarrhea and mouth and throat inflammation. A cooled tea made from the dried berries can be either drunk or gargled for these purposes.
Specifically, bilberry may help to:
Herbalists have also long considered bilberry useful for treating night blindness and daytime vision impaired by glare. But while some studies indicate at least some short-term effectiveness with bilberry, others find no benefit at all over the use of a placebo (dummy drug or sugar pill).
The herb is also quite popular for preventing macular degeneration, a condition in which the light-sensitive area in the center of the retina breaks down.
It may also help slow the progression of cataracts, a clouding in the eye's lens that is common in older people. In one study of 50 patients with age-related cataracts, it was found that taking bilberry extract along with vitamin E supplements stopped the progression of cataracts in nearly all of the participants. It remains unclear, however, whether the vitamin or the bilberry, or even the combination of the two, was responsible for this beneficial effect.
The herb has also shown promise in lessening the effects of diabetic retinopathy, a degenerative eye disease that affects people with diabetes.
A 1988, single-blind, placebo-controlled study of this herb included 60 patients with poor circulation (or venous insufficiency). The results showed that bilberry extract decreased the participants' discomfort when taken over a period of 30 days. The study had some design flaws, however, and more research on the subject is clearly needed.
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