Finals week: the dreaded seven or so days for all college and university students. It’s the time of year when all that matters are grades, grades and more grades, and you go through the several stages of revision (when you\u0027re not procrastinating). \r\nA common mistake many make during this crucial period is to eat poorly and unhealthily. Junk food, lots of chocolate, energy drinks and crisps are often eaten in place of normal meals to “keep energy levels up”. However, this is not only harmful to your long-term health, but can also negatively affect your exam performance. Here are some brain food suggestions to ensure you\u0027re at your best on exam day.\r\nOily fish\r\n\r\nvia GIPHY\r\nSalmon, sardines and mackerel are among the healthiest types of fish, as they contain lots of protein and omega 3, which is essential to keeping a functioning brain working well. Herring and trout are other possible options, but the simplest (and cheapest) meal for students is probably sardines on toast. Choose whole-wheat bread and you\u0027ll have a healthy, long-lasting meal, combining complex carbohydrates, vitamins and protein.\r\nEggs\r\n\r\nvia GIPHY\r\nLet\u0027s face it: eggs are one of the most versatile foods on Earth. Fried, boiled or poached, eggs are healthy and good brain food. They\u0027re a great way to start the day, and are more likely to leave you feeling full than sugary cereals or pastries. Just one egg contains vital nutrients, 6g of protein, vitamin B12 (which helps convert glucose into energy) and less than 100 calories - depending on how you cook it.\r\nDark leafy greens\r\n\r\nvia GIPHY\r\nKale, chard, spinach, broccoli: the list of healthy dark leafy greens is a long one, and they\u0027re a vital source of vitamins in the run-up to exams. All dark greens are packed with vitamin K, which helps build pathways in the brain, as well as naturally occurring nitrates and antioxidants. You\u0027ll also get a healthy amount of B6 and B12 from some of these vegetables, which are associated with improvements in alertness and memory.\r\nPeanut butter \r\n\r\nvia GIPHY\r\nGo on, eat it out of the jar with a spoon. We won\u0027t judge you. Many people think peanut butter is an unhealthy food, but it actually contains healthy fats and lots of protein per serving. This means that as a brain food, just a little can keep you full for a long time. If you\u0027d rather have porridge in the morning instead of eggs, try mixing some peanut butter into your morning bowl, a delicious way to start the day. Nuts, in general, are also an extremely good brain food, so stock up on snacking packs before your next trip to the library or study session in your dorm room. \r\nGreen tea\r\n\r\nvia GIPHY\r\nCaffeine, in the short-term, can provide a useful boost immediately before an exam, but don\u0027t be tempted by stomach-churning energy drinks. Coffee is a good alternative, but should be drunk with caution. Drinking too much could leave you unable to focus properly, while becoming dependent upon it will only make you more fatigued in the long-run. Green tea is a good alternative to high-caffeine options, as it provides antioxidants as well as boosting your concentration. \r\nFind out more about how to boost your brain power here.\r\nFresh fruit\r\n\r\nvia GIPHY\r\nIf you need a sugar boost, the naturally occuring sugars in fresh fruit are going to be much more useful than a chocolate bar or two. Darker colored fruits, such as blueberries, are thought to contain more antioxidants, but you\u0027ll feel the benefits of eating any fruit, whether it\u0027s a banana, an orange or even a slice of melon.\r\nRead about more brain-fueling foods here.\r\nThis article was originally written in March 2013 and was updated in April 2017.\r\nWant more content like this? Register for free site membership to get regular updates and your own personal content feed.