The human body was created to be active. It is very important to do exercise a minimum of 30 minutes daily. This will keep the body in shape and free of any ailments (unless genetically induced). Any kind of exercise is fine: swimming, brisk walking, rowing, aerobics, bicycling, etc., etc. By doing so you will eliminate visits to the doctor or hospital. Also, if you eat the proper foods, such as greens, fruits, and nuts, you do not need any kind of vitamins (see my post about vitamins). And finally, deep breathing is quite important. This should be done in sets of three throughout the day.
One of the most important things about the human body is to be aware that the body will not forget what you do to it. If you smoke, you will have lung problems and you could develop cancer in any part of the body. If you drink to excess you will have problems with the liver and other organs. If you do drugs you may one day OD and die. To summarize, whatever you do to your body, it will get even with you. If you take care of your body, it will be to your benefit, if you don’t, it will be to your detriment. Period.