The antioxidants in cranberries strengthen your immune system allowing your body to successfully fight infections. That is why they are considered a superfood due to their high antioxidant and nutrient content. Moreover, they support your digestive health, improve your heart health and your eyesight, help prevent urinary tract infections (UTIs) and protect your liver. As a matter of fact, studies have shown that they may have anti-cancer and anti-inflammatory effects.