GLOSSARY

Exogenous Nutrient refers to a nutrient originating outside the body, for example from food, drinks or supplements. 'Exogenous' describes origin; it does not by itself establish essentiality, superior quality or a need to use a supplement.

Nutrient intake is estimated from the amount of food consumed and its composition, usually in grams, milligrams, or micrograms per day. Units and the reporting period matter. Food weight does not equal the quantity of a nutrient within it.

The amount consumed is not necessarily the amount absorbed or used by the body. Chemical form, meal composition, food structure, and gastrointestinal condition influence bioavailability. Presence in a composition table therefore does not guarantee an identical biological response.

Most foods provide several nutrients together. Lentils, for example, contain carbohydrate and fibre as well as protein, while milk can provide protein and calcium. Assigning each food to just one nutrient therefore simplifies its actual composition.