There are several methods used to assess nutrient intake, including:
1. Food Frequency Questionnaires (FFQs): These are used to estimate an individual's usual intake of various nutrients over a specified period. 2. 24-Hour Dietary Recalls: Participants report all foods and beverages consumed in the past 24 hours. 3. Dietary Records: Participants record everything they eat and drink over a set period, usually a few days to a week. 4. Biomarkers: Biological samples such as blood, urine, or tissue are analyzed to measure levels of specific nutrients.
