What vitamin keeps you awake? There is one vitamin out there that is known for helping to keep you awake after you take it. It can be found in energy drinks, energy shots and in pill form. Too much of it may make you or your stomach feel uneasy, but when you take the right amount, it will wake you up just fine. They are good for doing a long day of work or anything that requires extensive focus. Overall, making sure that you have no vitamin deficiencies is a safe route to take and can be helped by taking a multivitamin or supplements that supply the necessary nutrients. Share this with your friends to see if they know the positive effects vitamins can have on a person. After, leave us a comment below with what vitamins you prefer to take!