Health care products can not be eaten after the expiration date, mainly because health care products after the expiration date, the loss of nutrients basically clean. Food is an organic material, long time storage, air oxidation or light environment can occur chemical changes, resulting in harmful and toxic substances, including vitamins in the case of light can deteriorate and produce toxic effects. In addition, some health products are protein or animal fats, after a long period of time will appear rancidity, corruption, deterioration, producing toxic substances, if eaten again, very bad for human health. Not only health care products, food, drugs, after the expiration date are not eaten, should be discarded, properly destroyed.