Low iron levels can show up in different ways, though some people may have no symptoms. Common signs include constant fatigue, unexplained weakness and shortness of breath, especially during exercise. Pale skin, brittle nails and hair loss can also be signs of iron deficiency. In more severe cases, you might experience a fast heartbeat or headaches, or even unusual cravings for non-food items.

Iron supplements provide several health benefits, especially if you have low iron levels or anemia. They help boost hemoglobin and myoglobin production, which are essential for carrying oxygen in the blood and muscles. Better oxygen circulation can - in turn - increase energy, reduce fatigue, and improve memory and concentration. Iron also strengthens the immune system, helping the body fight infections more effectively.

Iron supplements are absorbed best when taken in the morning on an empty stomach, ideally away from food and coffee. If taking iron supplements in the morning isn't an option, try taking iron at least one hour before or two hours after eating.

Iron supplements usually start working within a week, but it can take a few months to fully restore iron levels. The time it takes depends on the type of supplement you take.