GLOSSARY

Nutrition Facts Label A standardized nutrient-information panel interpreted under its applicable labeling rules and stated serving basis.

Food-label reference values support product comparison within the applicable labeling system. A percentage refers to a stated amount of food and a reference value; it is not a measurement of the eater's personal requirement. Check serving size, servings consumed and whether the panel is per serving or per mass. Label rules and permitted claims differ between jurisdictions. An athlete may need more carbohydrate or energy than the generic reference, while a large micronutrient percentage does not automatically improve performance or justify additional supplements.

Dietary reference systems distinguish average requirements, recommended intakes, adequate intakes and upper limits. Their meaning depends on the authority, population, life stage and nutrient. An average requirement is intended to meet the needs of about half of a specified healthy group, whereas a recommended allowance covers nearly all. These are not interchangeable with food-label values. For an athlete, identify the reference system first, then consider whether training or clinical circumstances require an individualized assessment beyond that population framework.

An adequate intake is used when evidence is insufficient to establish an average requirement and a recommended allowance. Intake at or above that value can support a judgment of adequacy, but intake below it does not establish the probability of inadequacy. An upper intake level concerns risk of adverse effects, not an intake goal. Its scope may include all sources or only specified forms. Check the nutrient-specific definition before combining food, fortified products and supplements in an athlete's intake review.

Portion assessment translates what a person reports into a usable quantity. Household measures, photographs, food models and scales offer different types of help; none eliminates uncertainty. Distinguish an individual's actual portion from a standardized serving used for analysis or labeling. Check density, container size, edible fraction and whether a photograph depicts the same food form. In an athlete's plan, practical examples should make adequate intake easier while allowing the assessor to explain how the reported amount was estimated and where uncertainty remains.

For example, a bottle can contain more than the stated serving even when its nutrient panel looks modest. Calculate the amount actually consumed, then place it within the full dietary intake. A label percentage answers a product-comparison question; the athlete's requirements still need an appropriate separate assessment.

Food composition analysis depends on matching the reported food to an appropriate database entry. Variety, brand, fortification, preparation and raw-versus-cooked weight can change the match. Missing data do not necessarily mean that a nutrient is absent. Recipes require ingredient amounts, edible yields and suitable retention assumptions. Record the database and version when comparability matters. A detailed software output remains an estimate; checking the food match and units can be more valuable than reporting many decimal places from uncertain intake data.

Assess adequacy using usual intake, an appropriate requirement distribution and the purpose of the assessment. A single day below a recommended allowance does not diagnose deficiency. Population estimates and decisions about an individual require different reasoning; some methods also rely on assumptions that do not hold for every nutrient. Intake ratios summarize a comparison, not absorption or clinical status. An apparently favorable average across nutrients can hide a serious shortfall in one, so retain the individual nutrient findings and relevant clinical context.