GLOSSARY

Iron Toxicity is harm from inappropriate exposure to the element or its compounds, with form, route, amount and duration determining risk.

Iron supplements can cause constipation, nausea and other adverse effects and may be unsuitable in overload or inherited disorders. Treatment depends on elemental amount, diagnosis and follow-up; injections are not general athletic energy aids. Correcting confirmed deficiency can help, while routine supplementation in adequately supplied people has no guaranteed performance benefit. Keep products away from children because excessive ingestion can cause serious poisoning.

Iron supports oxygen transport in hemoglobin, muscle function through myoglobin and electron-transfer enzymes. Inadequacy can impair exercise tolerance, but not every performance decline is iron-related. Athletes need assessment of energy intake, menstrual losses, plant-based eating, illness and training together. Raising stores without an established reason is not an independent endurance goal or a replacement for adequate recovery and training management.

For iron, assess food and all supplements alongside symptoms; the ingredient name on a product establishes neither need nor the cause of fatigue.