A to Z of nutritional supplements: dietary supplements, sports nutrition foods and ergogenic aids for health and performance -- Part 21

Part 21 deals with the major topic of iron supplementation. Iron deficiency is a well-known problem in the general population and athletes in particular. Symptoms in the latter group include decreased endurance ability, chronic fatigue and recurring illnesses such as minor infections and symptoms, which are also often prevalent in unexplained underperformance syndrome (overtraining). The review of iron, which our experts have provided, is comprehensive. In addition, two lesser topics (α-ketoglutarate (AKG) and α-ketoisocaproate (KIC)) are addressed in separate articles.