What are common signs of iron deficiency in adults?

Iron deficiency in adults commonly presents as fatigue and weakness, which occur because the body can't produce enough hemoglobin to carry oxygen efficiently. Pale or yellowish skin, shortness of breath during normal activities, and dizziness or lightheadedness are also frequent signs. Many people experience headaches, cold hands and feet, and brittle or spoon-shaped nails. A sore or inflamed tongue, dry skin, and hair loss can also occur. Some adults develop pica, an unusual craving to eat non-food items like ice, dirt, or starch. Restless leg syndrome has also been linked to iron deficiency. If several of these symptoms are present, a doctor should evaluate iron levels through a blood test before any supplementation begins.