At every meal, we make choices of what to feed our bodies—and our brains. Too much sugar and refined carbs, not enough good fats, inadequate intake of the right nutrients, and exposure to toxins can have a negative effect on our brains and even contribute to disorders ranging from brain fog to depression to Alzheimer’s. Nutrients are the fertilizer for the brain. When we get the right kinds, our brain can flourish and grow, even generating new cells in older age, long after science previously thought was possible.