GLOSSARY

Dietary Iron refers to this substance supplied by foods and drinks, with food composition and form influencing usable amounts.

Heme iron occurs in animal tissues; nonheme iron occurs in plant foods, fortified products and part of animal foods. Their uptake differs, so total table iron does not establish absorbed quantity. Pairing legumes with a vitamin C source is practical for plant-based meals. Meat exclusion calls for planned replacements, not an assumption that every vegetarian is automatically deficient or needs a therapeutic supplement.

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.

Absorption depends on chemical form, serving amount, the food matrix, body needs and gastrointestinal function. A percentage measured for one product under study conditions is not a fixed value for every person and meal. Label quantity describes intake. Practical decisions also consider digestive tolerance, elemental amount and outcome evidence, rather than a high-absorption marketing statement alone.