Research Links Anti-Inflammatory Diets to Reduced Dementia Risk

It’s been established for a while that eating well, particularly following certain diets, is beneficial for brain health. Recent findings published in JAMA Network Open highlight that an anti-inflammatory diet could be significant in lowering dementia risk, even for those already considered at higher biological risk.

So, what did this study reveal? What’s an anti-inflammatory diet, really? And what steps can people take as they get older to safeguard their brain health?

To dive deeper, I consulted with Dr. Leana Wen, a wellness expert affiliated with CNN. Dr. Wen, an emergency physician and clinical associate professor at George Washington University, has previously served as Baltimore’s health commissioner.

Insights About the Study

CNN: What does this new study tell us about anti-inflammatory diets and dementia risk?

Dr. Leana Wen: This study observed over 1,800 adults aged 60 and up in Sweden who were dementia-free at its onset. The researchers conducted detailed food questionnaires over six years and assessed three blood biomarkers connected to Alzheimer’s and other brain injuries. They tracked the participants over a span of up to 15 years, noting that 240 eventually received dementia diagnoses.

The results indicated that participants with lower inflammatory potential in their diets were less likely to develop dementia. This trend held true even in those whose blood tests showed a higher biological risk. For example, individuals with elevated levels of a biomarker called p-tau217 exhibited a 29% lower risk of dementia when adhering closely to an anti-inflammatory diet. Similar trends were evident among those with other biomarkers linked to nerve cell damage and inflammation.

Understanding the Anti-Inflammatory Diet

CNN: What exactly is an anti-inflammatory diet? Is it the same as the Mediterranean diet?

Wen: There isn’t an officially defined anti-inflammatory diet. It’s more of a description of eating patterns that reduce chronic inflammation in the body.

This particular study didn’t mandate a strict diet for participants. Instead, it calculated each person’s dietary inflammatory index based on comprehensive food questionnaires. Diets rich in vegetables, fruits, nuts, legumes, and whole grains, and low in sugary drinks, ultraprocessed foods, and red meats, were identified as having lower inflammatory potential.

There’s quite a bit of overlap with the Mediterranean diet, which also promotes fruits, vegetables, whole grains, legumes, fish, and healthy fats like olive oil. The main takeaway isn’t about finding a one-size-fits-all diet. Rather, focusing on whole and minimally processed foods while reducing ultraprocessed options seems beneficial for various health aspects, including brain function.

The Impact of Inflammation on Brain Health

CNN: How might inflammation affect the brain and lead to a higher dementia risk?

Wen: Inflammation is typically part of the immune response in the body. It plays a vital role in healing after an infection or injury, but chronic low-grade inflammation can linger for years. Researchers suspect this may be a contributing factor to many age-related diseases.

Chronic inflammation can harm blood vessels, damage nerve cells, and activate immune cells in the brain, which may lead to cognitive decline. Nevertheless, dementia is a multifaceted condition influenced by many factors, including genetics, vascular health, hearing loss, and lifestyle choices like smoking and excessive alcohol consumption. So, inflammation is just one part of a larger picture.

Dietary Changes for Those at Risk

CNN: Should individuals with a family history of Alzheimer’s or other risk factors alter their eating habits?

Wen: This study certainly gives more reasons to embrace healthy eating, but I think it’s essential not to overstate the findings. It’s observational, so while it notes correlations between diet and dementia, it doesn’t definitively prove causation. Participants reported their diets, which introduces possible inaccuracies.

Additionally, since the study focused on older adults in Sweden, the results may not apply universally. It’s important to remember, having risk factors doesn’t ensure someone will develop dementia.

Still, the study is credible and carried out over years, offering a hopeful message: we can modify certain risk factors. While age and genetics are fixed, dietary choices can positively impact health.

Lifestyle Habits to Enhance Cognitive Health

CNN: Besides diet, which lifestyle habits can help reduce dementia risk?

Wen: Regular physical activity is crucial. Managing blood pressure, cholesterol, and diabetes also plays a significant role, as healthy blood vessels are vital for a healthy brain. Moreover, avoiding smoking, limiting alcohol consumption, and ensuring enough sleep are linked to better cognitive health.

Staying socially engaged and mentally active is equally important. Activities like spending time with loved ones, community involvement, volunteering, pursuing hobbies, and learning new skills help keep the brain vibrant.

The Broader Benefits of an Anti-Inflammatory Diet

CNN: In what ways is an anti-inflammatory diet beneficial beyond dementia?

Wen: The same dietary patterns that reduce inflammation are linked to lower risks of heart disease, stroke, Type 2 diabetes, and certain cancers. They also help maintain a healthy weight and improve metabolic health.

Even if forthcoming research suggests the impact on dementia isn’t as significant as this study indicates, following such a diet is likely to yield numerous additional health benefits. It’s best to view these dietary changes as long-term lifestyle choices rather than quick fixes aimed solely at preventing one specific illness.

This approach emphasizes a more holistic view towards eating. Rather than searching for a miraculous “superfood” or adhering too rigidly to a specific diet, concentrating on overall eating patterns is key. Small, sustainable adjustments—like increasing vegetable and whole grain intake, choosing fruits or nuts over ultraprocessed snacks, and opting for water instead of sugary drinks—can accumulate substantial benefits over time. This idea is supported by decades of nutritional research across various health domains.