Hypoglycemia, also known as low blood sugar, is when blood sugar decreases to below normal levels. This may result in a variety of symptoms including clumsiness, trouble talking, confusion, loss of consciousness, seizures, or death. A feeling of hunger, sweating, shakiness, and weakness may also be present. Symptoms typically come on quickly.
Tea brewed from dried bilberry fruits has also been used to soothe a sore throat or sore mouth tissue. In folk medicine, bilberry leaf has been used to treat a number of conditions including diabetes. Limited evidence from a few animal studies shows that it may have a decreasing effect on blood sugar.
Bilberry does not appear to interfere with blood clotting. 25. Little is known about the safety of bilberry leaf. Based on animal evidence that it can reduce blood sugar levels in people with diabetes, it is possible that use of bilberry leaf by people with diabetes could require a reduction in drug dosage.