Eating vitamins on an empty stomach nausea, because the organic compounds in the vitamins cause stimulation of the gastric mucosa caused by the proper supplementation of vitamins can improve the body’s immunity to prevent disease. But in the supplemental vitamins should try to avoid eating on an empty stomach, otherwise it will cause nausea. Vitamins not only contain a large number of vitamins also contain some organic compounds, in the digestive system will enter the gastrointestinal tract mucosa caused by stimulation, resulting in abnormal spasm of the stomach wall, the contents of the stomach will be squeezed will show nausea. And eat on an empty stomach due to the lack of food and neutralization, vitamins will enter the human blood directly into the bloodstream leading to increased concentration in the blood, can not be better utilized by the body. When taking vitamins should try to choose to take after meals, so that not only can better utilize the effective substances, but also will not cause irritation to the mucous membrane of the gastrointestinal system.