The relationship between lactation and feeding time is not exact. The process of food nutrients reaching breast milk is complex, and it is difficult to estimate the time for the effective nutrients in food to reach breast milk clinically. The time required for the digestion and absorption of food into the bloodstream varies due to the different nutrient contents and individual metabolic rates. For example, liquid or semi-liquid food, such as thin rice and rice soup, can be absorbed in about half an hour or one hour. Meat foods, on the other hand, may take 3-4 hours or longer. Blood transports nutrients to the breast to nourish the mammary gland, which converts these raw materials into milk again. Therefore, milk is not transformed by blood, but by food and water into blood before it can be transformed into milk by the mammary gland, and the process is complicated and cannot be quantified exactly. At the same time, the blood circulation rate and metabolic rate vary from body to body, and the time of milk production varies greatly. Therefore, it is not clear how long it takes for food to be converted into breast milk. Maternal women can consume nutritious and easily digested and absorbed foods, pay attention to eating less and more meals, eat more protein and soup-based foods, and take appropriate vitamin and iron supplements.