Turning up the heat with chile peppers can help you crank up the antioxidants. Capsaicin is the powerful compound in peppers that gives chiles their heat. The hotter the pepper, the more capsaicin (and antioxidants!) you'll find. Cayenne or ground red pepper contains the most. Yet all red peppers – including chili powder and the milder paprika – are surprisingly good sources of antioxidants.f you're trying to eat less, red pepper might help. Some studies have shown that when people added red pepper to their food they ate fewer calories during that meal – and even during the next meal. It seems that capsaicin helps increase satiety, or a feeling of fullness.Beyond helping you control your appetite, initial findings of some studies indicate that spicing up your meal with cayenne, chili powder and paprika can help boost your metabolism. Even milder, sweet red peppers have been found to increase calorie burning.