Cranberries are small, tart, bright-red berries that are a popular treat, especially during the holiday seasons They’re packed with antioxidants and provide many health benefits.Cranberry supplements, which are made from dried, powdered cranberries, offer an easy way to enjoy these benefits without having to eat cranberries every day.Cranberry pills contain proanthocyanidins, which prevent E. coli bacteria from attaching to the urinary tract and causing painful infections.Cranberry juice and extracts may boost immunity, lower blood sugar in people with diabetes and protect against cancer, heart disease, stomach ulcers, cavities and gum disease. Cranberry pills may have similar effects, but more research is needed.They are packed with antioxidants and can help reduce the frequency of urinary tract infections in some people. Also, they may promote heart health, improve blood sugar control, boost immunity and protect against cancer, cavities and stomach ulcer.Cranberries and cranberry pills contain very high levels of antioxidants, which protect your body from free radical damage linked to various chronic diseases.