Bilberry is a plant. The dried, ripe fruit and leaves are used to make medicine. Bilberry is used by mouth to treat poor circulation that can cause the legs to swell. Some people take bilberry for diabetes, high blood pressure, gout, urinary tract infections (UTIs), and many other conditions.
Berberine found in bilberry may also be effective as a weight loss supplement. So far, two studies have examined the effects on body weight. In a 12-week study in obese individuals, 500 mg taken three times per day caused about 5 pounds of weight loss, on average. The participants also lost 3.6% of their body fat