DHA, a fatty acid found in fish like sardines and anchovies, was found to increase cognition, learning and memory in those elderly patient experiencing age related cognitive decline.
Another recent study concluded that elderly patients with the highest serum levels of vitamin E had a 25% decreased risk of developing dementia than those who had the lowest levels of serum vitamin E. The researchers felt higher intakes of foods rich in vitamin E may modestly reduce long-term risk of dementia and Alzheimer's disease.
I recommend supplementing with an Omega-3 supplement daily. It is important to know, however, that not all supplements are created equal. It is imperative that you take a high-quality fish oil supplement. I, therefore, recommend Heart Health Omega-3 Supplements. Heart Health Essential Omega III with Vitamin E is a superior product for a number of important factors. The best fish are used to produce a clean and safe product that is rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). It also contains 3000mg of fish oil where most other commercial products contain a third of the total fish oil contained in Heart Health Essential Omega III. Heart Health Essential Omega III comes from small fish where other competitive products use large fish which are more likely to accumulate toxins. Heart Health Essential Omega III provides a high quality, high purity product with significant percentages of the health promoting EPA and DHA.
The fish oil in Heart Health Essential Omega III with Vitamin E comes from sardines and anchovies harvested off the coast of Peru. Not only do anchovies and sardines have a high omega III content, they also have high percentages of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Anchovies and sardines have a short lifecycle making them an ideal source of fish oil because they are less prone to accumulating environmental toxins that can be found in larger, longer-lived fish. Contaminants are generally low in sardines and anchovies even before they go through an intense purification process. Every batch of fish oil is hand selected and tested prior to processing by our manufacturer and must pass more than 200 quality checks during the production process.
Source: Beneficial effects of docosahexaenoic acid on cognition in age-related cognitive decline
Source: Dietary Antioxidants and Long-term Risk of Dementia