Alcohol in small doses may help you relax. However, in larger amounts it may increase stress as it disrupts sleep and causes hangovers. Large amounts over an extended period will start damaging your body. Nicotine in the very short-term may appear to relax your body, but it doesn t. Nicotine s toxic effect raises the heart rate and stresses the body and lungs. There are a number of stop-smoking aids available on the market today.
Sugar can raise energy in the short term.
Unfortunately, your body has to counteract the high dose of sugar in your blood by raising your insulin level. Once your blood-sugar level is normalized, the insulin will continue acting and you will experience a decrease in energy lower than before you ate the sugar. Try not to overtax your body by feeding it high dosages of sugar.