B vitamins are water-soluble vitamins and are generally recommended to be taken after breakfast or lunch for better results. B vitamins are a large family, the common ones are B1, B6, B12, B2, folic acid, niacin, pantothenic acid, etc. B vitamins can promote the metabolism of sugar, fat and protein, and promote energy release. Relatively speaking, the body needs more energy during the day and less energy for rest at night, so it is recommended to take them in the morning or at noon. Taking them before a meal may cause the B vitamins to be absorbed too quickly, thus accelerating metabolism and failing to achieve a reasonable utilization effect, so it is recommended to take them after a meal. B vitamins can be consumed with the body’s sweat and urine metabolism, and need to be replenished in a timely manner. Normal foods such as coarse grains, soy products, dairy products, green leafy vegetables, etc., are rich in B vitamins, and a normal diet generally does not cause B vitamin deficiency.