Many people may come across the problem that the physical health of the body has always been threatened by various diseases even if people has paid attention to the health care and dietary therapy. It is necessary for people to think carefully about the ordinary things around them. For example, alcohol, cigarette and coffee can all hurt the human health. 

Alcohol can steal vitamin B1 from the human body. The metabolism of alcohol needs to waste vitamin B1 inside the human body. Therefore, the long-term drinking can cause the inadequate supply of vitamin B1, which can seriously threaten the liver and cranial nerves. Therefore, the medical experts advise that people should supplement vitamin B1 after drinking so as to prevent the short supply of vitamin B1 and provide some other kinds of vitamins for the liver and cranial nerves.

Cigarettes can steal vitamin C from the human body. The coke tar contained in cigarettes can consume a large amount of vitamin C. According to the medical research, a piece of cigarette can consume 25 milligrams of vitamin C. People who like to smoke in everyday life should increase the intake of foods containing vitamin C like tomatoes.

Exercises can steal vitamin E. When people are doing exercises, they need a lot of energy and the consumption of oxygen can be increased, which can accelerate the production of free radicals. It is necessary for the human body to consume vitamin E to repair these free radicals. Therefore, people should absorb vitamin E after they do some exercises. In addition, vitamin E can relax the muscles and prevent the aging of the internal organs.

High temperature and low temperature can steal vitamins. When the human body adjusts the body temperature by itself, it needs to consume various kinds of vitamins, such as vitamin C and vitamin B. When the body temperature is very low, the secretion of adrenal hormones will be increased and the consumption of vitamins like vitamin A will also be increased. Therefore, it is necessary for people to take multi-vitamins in everyday life.

Computer can steal vitamin A from the human body. If people always use computers, optic cells will need a large amount of vitamin A. The medical experts advise people to supplement vitamins in everyday life so as to supplement vitamin A and beta-carotene which can be transformed into vitamin A when vitamin A is lost too much.