Coconut oil. Arguably the most effective preventive food for avoiding Alzheimer’s, coconut oil has a near-miraculous ability to both repair and rejuvenate the brain. Scientists have learned that brains unable to properly metabolize glucose require a special compound known as ketones to effectively function — and coconut oil is the richest known source of a special type of fat that is converted directly into ketones upon consumption. Known as medium-chain triglycerides (MCTs), these powerful substances help to eliminate the amyloid plaques in the brain that are linked to Alzheimer’s, as well as facilitate the restoration of a healthy brain.
Turmeric. Another powerful dementia-fighter, turmeric, also commonly known as curcumin, is an absolute must for maintaining brain health. In India, where turmeric is widely consumed as part of curry and other meal dishes, Alzheimer’s and dementia rates are among the lowest in the world. And numerous scientific studies have found that turmeric exhibits measurable anti-dementia effects, as it is a powerful brain food.
Pastured eggs and raw butter. Rich in natural vitamin B12, pastured eggs — that is, eggs that come from chickens who roam pasture and feed on worms and other bugs — are a powerful health-promoting food that play a major role in Alzheimer’s prevention. Vitamin B12, which is only found naturally in animal-based foods, has been shown in scientific studies to be vitally necessary for preserving brain health. Omega-3 fatty acids, which are also found in high amounts in pastured eggs, are also an important brain food.
Walnuts. Though not as nutritionally-dense as raw butter and pastured eggs, walnuts are also reasonably high in omega-3 fatty acids, as well as other nutrients that have been shown to improve cognitive function. According to research funded by the U.S. Department of Agriculture (USDA), eating a moderate amount of walnuts, as well as other whole foods, as part of a healthy diet can help improve cognitive function and motor skills, and improve neural function. (source)