Vitamin B can be taken in the morning on an empty stomach, and it is a water-soluble vitamin, most of which begins to be absorbed in the stomach, so it is easier to contact the stomach wall when taken on an empty stomach, increasing the absorption area and also increasing the absorption rate of the drug. Unlike fat-soluble vitamins such as vitamin A and vitamin D, the absorption rate is lower on an empty stomach, so it is not clinically recommended to take them on an empty stomach. However, it should be noted that some B vitamins, such as vitamin B3, are not recommended when there is an active ulcer; in addition, those with diabetes and hyperuricemia should not take them, so we should pay attention to mastering the contraindications. At the same time in the daily food, cereal food shells are made of high content of B vitamins, so try to eat whole wheat flour, rice, millet, corn can be supplemented with B vitamins, so that you can achieve to reduce the lack of B vitamins caused by physical disease.