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The questionnaire is designed for studies of 100 or more participants. There are different versions available for children, young people, adults and older adults. The questionnaire is primarily suited to participants whose diet is based on common UK-based foods and whose diet is consistent over a 3-month-period.

FFQs should not be used to estimate the intake of individuals or to provide dietary advice. It is important to note that diet and nutrient estimates of intake cannot be used to provide dietary advice to individuals or small groups.