Tag: Study limitations

Food frequency questionnaires (FFQs) have been widely employed in large-scale epidemiological studies since the 1990s to investigate the relationship between dietary intake and disease incidence. They have become a key research tool due to their relative ease of administration and cost-effectiveness compared to other dietary assessment methods. However, their suitability and accuracy for long-term disease risk assessment continue to be a subject of debate within the scientific community.

A 2018 study in *Advances in Nutrition* highlighted that reliance on nonrandomized observational data has created widespread confusion about optimal nutrition. This points to the significant limitations of nutrition research, which stem from complex methodologies and inherent data collection issues that challenge the validity of findings.