The healthier you are the smarter you will be. This starts from the time we are in the womb, as the mother’s nutrition helps us develop sharp minds and quick thinking. After we are born, it has been demonstrated that ongoing breastfeeding is important for the development of intelligence in infants. As we grow older, avoiding stupefying addictions such as alcoholism helps to keep us sharp. The brain relies on a variety of nutrients to function properly and stress has been shown to not only affect health but also our ability to think clearly. So if you are worried that you might not be as sharp as you could be, you might want to improve your health to improve your intelligence.