Kohlrabi is loaded with antioxidants like anthocyanins, isothiocyanates, glucosinolates, and vitamin C.Having a rich amount of it in your system can help your body tackle free radicals looking to cause damage, which can increase your risk of serious health conditions like heart disease and cancer. Consuming a diet that includes foods that are high in antioxidants, like kohlrabi, could even reduce your risk of premature death.