All of us feel the highs and lows of energy during the course of a day. This is perfectly normal. But sometimes, you may wake up feeling tired and this may continue throughout the day. There are many reasons as to why this may happen. Sometimes, underlying health conditions may be to blame. But more often than not, it may also be the result of an unhealthy lifestyle. Late nights, lack of exercise, unhealthy diet and bad habits are often to blame for your low energy. Your diet places the most important role here. You get your energy from the foods you eat. The right foods can boost your energy levels and there are some foods and drinks that can actually sap your energy and give you a drained feeling. Here, we draw up a list of 5 foods that you must avoid if you constantly feel tired and under the weather.