Willett Food Frequency Questionnaire

The Willett Food Frequency Questionnaire (FFQ) is a tool used in nutrition studies to assess individuals' eating habits over a specific period. It asks participants about the frequency and portion sizes of various foods they consume. This helps researchers gather detailed information on dietary patterns, which can be linked to health outcomes. The FFQ is valuable for understanding diet-related issues, as it captures a wide range of foods in a practical way, making it easier to analyze associations between diet and health. This questionnaire is often used in epidemiological research to study chronic diseases.