The first study, published in the Journal of Physiology, showed that a diet consistently high in fructose (i.e., high fructose corn syrup, corn sugar, corn syrup, etc.) slows the brain and hinders memory and learning; in essence, eating high-fructose diet over the long term alters your brain’s ability to learn and remember information.
However, that same study found that omega-3 fatty acids, especially DHA found in fish oils can protect your brain from the damaging effects of too much sugar. Does this mean you should continue to eat a high-sugar diet and just pop some fish oil capsules? No! It means that if you want to maximize your brain health, improve your memory and reduce your risk of Alzheimer’s and other forms of dementia you should dramatically reduce the amount of processed sugar in your diet and start consuming a high-quality fish oil supplement on a regular basis.