Egg yolk

While many try and avoid these for cholesterol reasons, egg yolk actually contains a nutrient called choline which can enhance your memory. Try and fit up to two eggs in your diet, three to four times a week.

Photo by Getty Images Aug 3, 2012

Ten foods to make you smarter

There really is such a thing as brain food. Here's a roundup of the top ten foods that will give you an intelligence boost when you next need it.