* antioxidant * Antibacterial properties * Benefits to the system cardiovascular * Reduces sugar in blood * It replaces salt. The sumac spice is full of vitamin C, omega-3 fatty acids, protein, fiber, potassium, calcium and magnesium. The sumac has antifungal benefits and is extremely rich in antioxidants. If you're not a fan of fish and you're worried about getting adequate amounts of omega-3 fatty acids, try adding sumac to your diet. Why you should cook with Sumac: If you're Middle Eastern, you're probably familiar with Sumac. It is a slightly acidic ruby colored spice found in the Palestinian salad Masakhan or Fatoush.