A recent study indicates a potential link between increased meat consumption and a reduced risk of dementia, but this association appears specific to individuals carrying the APOE4 gene variant. This genetic factor is strongly associated with an elevated risk of Alzheimer's disease.
The observational study, which tracked over 2,100 participants aged 60 and older for up to 15 years, examined dietary habits against cognitive function and dementia diagnoses. Researchers noted that a lower proportion of processed meat in the diet correlated with a reduced dementia risk, irrespective of APOE genotype.
For participants with the APOE4 variant, those who consumed the most meat showed a significantly lower likelihood of developing dementia, with slower memory decline observed. The findings suggest that for this specific group, meat intake, including red meat, might offer cognitive benefits. The exact mechanisms are still under investigation, with theories pointing to differences in nutrient absorption from meat among APOE4 carriers.
Interestingly, for individuals without the APOE4 gene, overall meat consumption did not show a link to cognitive test scores or dementia risk. However, a higher ratio of unprocessed to total meat intake, such as more red meat or poultry, was associated with a lower dementia risk for everyone, compared to high consumption of processed meats.
While this study reveals an association, it does not establish a causal relationship. Experts emphasize that further clinical trials are necessary to develop personalized dietary recommendations based on APOE genotype.