The word iron did not show up a single time in this article. It is extremely important to make sure your iron and ferritin levels are sufficient or you will feel tired and depressed all the time.
DellaValle DM, Haas JD. Impact of iron depletion without anemia on performance in trained endurance athletes at the beginning of a training season: a study of female collegiate rowers. Int J Sport Nutr Exerc Metab. 2011;21(6):501-6. Accessed April 10, 2023. https://www.qxmd.com/r/22089308
> iron investigation and supplementation should be considered in patients presenting with sleep disorders