Vitamin C is generally recommended to be taken best after meals. Vitamin C is a water-soluble vitamin that plays a very important role in maintaining the function of the body, especially in improving capillary permeability, which is important in preventing bleeding. Vitamin C deficiency may lead to scurvy in severe cases. Clinically, the best time to take vitamin C is after a meal. This is because the postprandial period delays its absorption and increases its utilization time in the body’s cells. If taken before a meal, it may cause too rapid evacuation, leading to premature excretion from the urine, thus affecting its absorption effect. In addition, it should be noted that if one is not deficient in vitamin C, it is generally not recommended to supplement it on one’s own, and blind oversupply is not good for health. Under normal circumstances, the human body can get sufficient vitamin C from food, daily can eat more green leafy vegetables and fruits, etc.