Processed Meats and Sugary Drinks Increase Dementia Risk
Eating processed meats and drinking beverages sweetened with sugar or artificial sweeteners is linked to a higher risk of dementia and Alzheimer’s disease, according to a comprehensive review published in the Annual Review of Nutrition.
Processed Meat Consumption Increases Alzheimer's Risk
Among the examined studies, a UK Biobank analysis tracking 493,888 participants over an average of about eight years found that each 25-gram daily increase in processed meat consumption corresponded to a 44% higher risk of all-cause dementia and a 52% higher risk of Alzheimer's disease. Kormedi reported these findings.
Brain Structure Changes Linked to Sweetened Drinks and Fats
The review also examined the connection between beverage consumption and neurological health. Diets high in drinks containing sugar or artificial sweeteners were associated with elevated risks of dementia and stroke. Brain imaging studies evaluated by the research team indicated that high intakes of fats, sugar-sweetened beverages, and meats correlated with smaller brain volumes. Certain fat- and sugar-sweetened drinks were linked to greater damage in the brain's white matter, the tissue that facilitates signal transmission between different brain regions.
Animal experiments reviewed in the research showed that mice fed a high-fat diet containing added sugar or salt accumulated higher levels of toxic proteins associated with Alzheimer’s disease in their brain’s memory centers. The study authors noted that potential biological pathways might involve inflammation, vascular damage, and chemical signaling alterations between brain cells. However, they emphasized that observational results alone cannot prove direct causation, and the exact mechanisms in humans require further investigation.