The next time you try to work out just why you can't think straight and get everything you need to get done completed, consider blaming your food. It's a scary concept - that our thoughts and ability to succeed can be so affected by what we eat, but for millions of people around the globe it's a day to day war their body and mind pit against each other. Even on very simple terms, we need the fuel from food to survive. While fasting can be used by some to clear the mind during certain events, as a general rule, our brain needs feeding. And it needs the right kind of feeding to do well.