Ever had those moments when you feel slowed down by a mental block, and you just can’t recall even the simplest of things? That’s probably because your brain isn’t in top notch condition due to a poor diet and lack of sleep. These 8 superfoods will help you increase your mental alertness and memory retention while reducing the risks for many other diseases, such as cholesterol and heart problems. Now, that’s killing two birds with one stone, or rather, a few superfoods!