Jim Kwik explains neuronutrition: the brain needs its own set of nutrients to work well. Brain fog and slow thinking often come from not feeding your brain right. His top picks are avocados, blueberries, broccoli, sardines, caviar for DHA omega-3s, and dark chocolate.
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What you eat matters, especially for your gray matter. This is in an area that most people aren't familiar with. It's called neuronutrition. Your brain actually requires different nutrients than the rest of your body, and most people are not feeding their brain, and they wonder why they're— they have brain fog. They wonder why they're slow to think. In general, the genius brain foods: you have avocados, right, the good fats. You have blueberries. I call them brain berries. You have broccoli, olive oil, which I love, green leafy vegetables, very good. Sardines are really good. Caviar is extraordinary, very high in DHA. DHA, the omega-3s that are very important, and finally dark chocolate.