Proanthocyanidan is a bioflavonoid that is present in a number of fruits and vegetables. It has been reported that proanthocyanidan contains both anti-viral and anti-bacterial properties, and has even shown promising results as a potential inhibitor of hepatitis C.

People have used blueberries for hundreds of years in an effort to improve a number of health-related conditions. Blueberries are an effective natural alternative to often expensive medications that often have a number of side effects and in some cases can even worsen the condition.