Iron is an essential element in the production of hemoglobin in the blood. Hemoglobin is essential for carrying oxygen through the bloodstream. Low iron levels can result in brain fog, dizziness and weakness. Seafood, enriched grains, spinach, beans and lentils along with meat are good sources of iron. Iron absorption is enhanced when it’s paired with Vitamin C in foods such as citrus, broccoli or bell pepper.