78.1 Rationale for Biomarker Calibration of Self-Report Measures of Diet78.2 Nutrient Biomarker Study Energy and Protein Calibration78.3 Measurement Error Properties of 4DFR, 24HR, and FFQ78.4 Calibration of Self-Report Measures of Physical Activity78.5 Psychosocial Measures and Biomarker-Calibrated Intake78.6 Calibrated Energy, Protein, Protein Density, and Cardiovascular Disease Incidence78.7 Diabetes and Calibrated Consumption78.8 Cancer and Calibrated Intake78.9 Associations Between Protein Intake, Frailty, and Renal Function78.10 Summary and Future DirectionsReferences