Iron supplements are best absorbed when taken 30-60 minutes after dinner, especially when taken at 7-8 pm, compared to the absorption rate in the morning. Iron supplements have certain side effects, some people will experience nausea, vomiting, diarrhea and other symptoms after taking iron supplements, taking iron supplements after meals can reduce its stimulation of the gastrointestinal tract, thus reducing the patient’s discomfort. The most active secretion of gastric acid after meals can prolong the residence time of iron in the duodenum, making it easier to be fully absorbed. In addition, the absorption of iron has an obvious diurnal pattern, and the effect is better when taken between 7-8 pm. In addition, patients taking iron supplements are advised to consume more vitamin C in their diet to facilitate the absorption of iron. Usually, you can also consume more iron-rich foods, such as egg yolk, seaweed, nori, wood ear, pig liver, cinnamon and pig blood.