Orange-colored sweet potatoes owe their appearance to the carotenoid beta-carotene. As an antioxidant, beta-carotene can help ward off free radicals that damage cells through oxidation, which can speed up aging and make you vulnerable against chronic diseases.
This antioxidant can help support your immune system, as well as lower your risk of heart disease and cancer. Research shows that sweet potatoes can help regulate blood sugar because of their ability to raise blood levels of adiponectin, a protein hormone created by your fat cells, to help regulate how your body metabolizes insulin.
Sweet potato extract is said to help reduce inflammation in brain and nerve tissue throughout your body. The phytonutrients within sweet potatoes also influence fibrinogen, an important glycoprotein required for blood clotting. Together with thrombin and fibrin, balanced amounts of fibrinogen are important for wound healing and blood loss prevention.
Source: Dr Mercola