Why are endurance athletes at higher risk for iron deficiency?

Endurance athletes have 30-70% higher iron losses due to foot-strike hemolysis (running), sweat iron loss, GI micro-bleeding during hard efforts, and elevated ferritin demands for increased red blood cell production.

What ferritin level is considered deficient for athletes?

Serum ferritin below 12 ng/mL indicates iron deficiency anemia. Many sports medicine practitioners use 30-50 ng/mL as the functional threshold for athletes, as levels below this impair V˙O₂max even without frank anemia.

How should iron supplementation be timed?

Iron absorption is enhanced when taken on an empty stomach or with vitamin C, and reduced when taken with calcium, coffee, or tea. Taking every other day may improve absorption compared to daily dosing.

Iron Requirement for Endurance Athletes

Calculate daily iron requirements for endurance athletes, accounting for increased losses from foot-strike hemolysis, sweat, and gastrointestinal bleeding during heavy training.

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Iron Requirement for Endurance Athletes

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Frequently Asked Questions

Why are endurance athletes at higher risk for iron deficiency?

What ferritin level is considered deficient for athletes?

How should iron supplementation be timed?