Most fruits have a lot of sugar in them which means they are high in carbs. Cranberries are thankfully an exception, they are low in carbs but high in fiber which means you can have cranberries on keto. They also have a ton of health benefits. The most well-known benefit of cranberries is they prevent urinary tract infections (UTI). Cranberries also prevent cavities, reduce inflammation, and improve digestion among other effects.