New research from Sweden suggests that eating a healthier diet may help lower the risk of dementia, even in people who already show early signs of the condition. The study followed nearly 1,900 adults aged 60 and older for up to 15 years, during which 240 participants developed dementia. Researchers evaluated participants' diets using three main factors: how closely they followed a Mediterranean-style diet, how well they met general nutritional guidelines, and the level of inflammation their diet might cause in the body. The results showed that people with better quality diets had a lower chance of developing dementia. This was especially true for those with higher levels of certain blood biomarkers—substances that can indicate a greater risk of dementia, including Alzheimer’s disease. For these individuals, diets with the lowest inflammatory potential were linked to a 30% lower risk of dementia. A low-inflammatory diet typically includes more vegetables, fruits, whole grains, legumes, tea, and coffee, while limiting red meat, processed meats, refined grains, and sugary drinks. The study emphasizes that while a healthy diet cannot fully prevent dementia, it is still crucial for brain health, even in people with biological signs of increased risk. Among those with lower dementia risk biomarkers, following a Mediterranean-style diet or sticking to nutritional recommendations was more strongly linked to a reduced dementia risk. However, the researchers caution that the study is observational, meaning it can show associations but not prove that diet directly causes changes in dementia risk. The study also acknowledges some limitations. For example, it relied on self-reported questionnaires to assess participants' diets, which can be less accurate. Additionally, the participants were generally healthier and more highly educated than the average person, which might mean the findings are not fully applicable to other groups. Researchers say more studies are needed to confirm these results and explore how diet might influence dementia risk in different populations.