Iron deficiency in athletes: A narrative review.

Iron deficiency is a concern for athletes due to potential for performance impairments attributed to lower iron status with, or without, accompanying anemia. Despite the high interest in the topic for endurance athletes and medical providers who care for this population, the evaluation and management of athletes with iron deficiency is still evolving, particularly in relation to iron deficiency non-anemia (IDNA). This narrative review presents causes of iron deficiency in the athlete, clinical presentation, differential diagnoses, diagnostic evaluation, and proposed strategies for treatment.