Resveratrol is known to promote healthy heart muscle function. Clinical studies indicate that this plant nutrient can help improve blood vessel function and circulation, promote healthy blood sugar utilization and improve the delivery of nutrients and oxygen to cells. Resveratrol has been shown to prevent coronary heart diseases and to exert a variety of anti-inflammatory and anti-cancerogenic effects. So, not only does it help strengthen your immune system to fight off illness, but it can also dial things back when your body displays autoimmune disease-related behavior.