Contents

9.1 General Considerations and Principles 224

9.2 Data Requirements 225

9.2.1 Protein Composition Data 225

9.2.2 Criteria for Selection of Protein Levels for Estimating Intake 225

9.2.3 Collecting Additional Protein Composition Data 225

9.2.4 Evaluating Temporal Changes in the Nutrient Content of Foods 226

9.2.5 Impact of Processing and/or Cooking on Protein Concentrations 226

9.3 Consumption Data 227

9.3.1 Food Consumption Data Requirements 227

9.3.2 Approaches for Food Consumption Data Collection 227

9.3.2.1 Population-Based Methods 227

9.3.2.2 Household-Based Methods 228

9.3.2.3 Surveys of Individual Dietary Practices 228

9.3.3 Combined Methods for Estimating Food Intake 229

9.4 Intake Assessment Models 230

9.4.1 Framework for Conducting Protein Intake Assessments 231

9.4.2 Point Estimates of Dietary Intake 232

9.4.3 Model Diets 233

9.4.4 Probabilistic Estimates of Dietary Intake 234

9.4.5 Duplicate Portion Studies 234

9.5 Sensitivity Analysis to Evaluate Uncertainty and Variability 234

9.6 Consumer Brand or Product Loyalty 234

9.7 Conclusions 235

References 235

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