Can dementia be prevented through diet? Some research suggests that eating the proper amount of healthy foods might delay the onset of dementia and Alzheimer's disease. Incorporate these 5 foods into your diet for a healthier body and brain:

1. Fish-based Omega-3 Fatty Acids
Some scientific studies show that people with high levels of Omega-3 fatty acids in their blood might be at a lower risk for developing dementia. Omega-3 rich foods – like salmon, tuna, trout, and sardines – contain fatty acids known as DHA and EPA that reduce inflammation in the brain and the development of beta-amyloid plaques.

You can always supplement cold-water fish with fish oil pills.

2. Walnuts and Flaxseed

ALA fatty acids also play a role in keeping your brain functioning healthfully. A 2014 study found that mice with a walnut-rich diet had an increase in learning skills and memory.

ALA fatty acids are also found in flaxseed, an easy-to-digest food that naturally adds fiber. Try blending flaxseed into smoothies or sprinkling it on top of Greek yogurt.

3. Dark Berries
Dark berries – like blackberries and blueberries – help protect the brain's glial cells. These non-neuronal cells make up 90% of the brain's tissue and help protect the nerve cells from damage.

4. Ginger
Ginger root provides the same protective benefits for glial cells – it also increases acetylcholine activity in your brain. This helps learning skills and maintaining memory. Further, ginger inhibits your body's production of acetylcholinesterase, an enzyme that naturally breaks down acetylcholine. Today's Alzheimer's drugs work similarly, but ginger has no side effects.

Ginger has more benefits, too – it's a strong antioxidant that reduces inflammation and prevents the formation of free radicals.

5. Leafy Green Vegetables
Research suggests that eating one serving of spinach, kale, or other leafy green vegetables per day might help slow cognitive decline. That's because these vegetables are rich in vitamin K, folate and beta-carotene.