The immune system, which includes cells, proteins, tissues and organs, defends you against germs and microorganisms daily. A normal immune system keeps you healthy and prevents infections, while a weakened immune system may lead to illness and infection. The high concentration of antioxidants in blueberries strengthens your immune system, which may protect you from cancer cell growth, cardiovascular disease and urinary tract infections. Studies suggest that blueberries may also reduce your risk of developing Parkinson’s disease.
Antioxidants
According to the U.S. Highbush Blueberry Council, fresh blueberries have more antioxidants than any other fresh fruits or vegetables tested to date. Antioxidants strengthen your immune system by neutralizing free radicals or unstable oxygen molecules, introduced into your body by exposure to cigarette smoke, toxins and pesticides. Free radicals contribute to disease and aging by damaging your cells. Studies show the high antioxidants found in blueberries slow age-related loss of mental capacity and help reduce the buildup of bad cholesterol, which leads to cardiovascular disease and stroke. The antioxidants in blueberries help prevent cancer, increase longevity and decrease risk of cardiovascular disease.
Anthocyanins
Anthocyanins, the blue pigments in blueberries, strengthen your immune system. These phytonutrients lower your risk of developing certain cancers, and support urinary tract health, memory function and healthy aging. According to the Harvard School of Public Health’s Department of Nutrition, men and women who eat blueberries regularly may also reduce their risk of developing Parkinson’s disease. Studies conclude that the neuroprotective effects of anthocyanins are a natural way to ward off the disease. Other studies suggest that the anthocyanins in blueberries improve eyesight and ease eye fatigue.
Proanthocyanidins
Proanthocyanidins, often referred to as condensed tannins, supply the astringent flavor to blueberries. They support the immune system with free-radical-scavenging properties. According to Oregon State University Berry Health Benefits Network, inconclusive studies suggest that proanthocyanidins help reduce the risk of developing cardiovascular disease, blood clotting, cancer and urinary tract infections.
Nutrition
Blueberries contain health benefits that support a healthy immune system. Nutritious substances include fructose, fiber, vitamins and antioxidants. The antioxidants in blueberries have the most conclusive role in preventing or delaying certain diseases. One cup of fresh blueberries daily provide 83 calories, 21 g of carbohydrates, 9 mg of calcium and magnesium, 17 mg of phosphorus, 112 mg of potassium, 14 mg of vitamin C, 78 IU of vitamin A and many other micronutrients.
References
- U.S. Highbush Blueberry Council; Antioxidant Capacity and Health Benefits of Fruits and Vegetables: Blueberries, the Leader of the Pack; Ronald L. Prior, Ph.D.
- New Hope.com; Nutrition Science News: Got Anthocyanins?; Marilyn Sterling, R.D.; December 2001
- Harvard School of Public Health: Eating Berries May Protect Against Parkinson's Disease
- Oregon State University: Berry Health Benefits Network: Blueberries
