Did you know copper might be the missing link in your battle with iron deficiency? Most people think taking more iron is the answer to anemia — but without enough copper, your body can’t actually use that iron. Copper activates an enzyme called ceruloplasmin, which is essential for transporting iron in your blood. If you’re deficient in copper, iron builds up in your tissues instead of getting into your red blood cells — leading to fatigue, dizziness, and low energy, even with iron supplements.