Fiber intake is associated with a lower risk of developing cognitive decline in those old people with the apolipoprotein E ApoE ε4 genotype, regarded as a genetic risk factor linked to the development of Alzheimer’s disease. This is stated in a study conducted by the Research Group on Biomarkers and Nutritional and Food Metabolomics of the Faculty of Pharmacy and Health Sciences of the University of Barcelona and the CIBER on Fragility and Ageing (CIBERFES).