Vitamin supplementation has relatively little effect on trace elements, but vitamin C supplementation usually promotes the absorption of trace element iron. Vitamin C supplementation helps promote the absorption of trace element iron on the principle that vitamin C, as a reducing agent, can reduce trivalent iron, which is unfavorable for absorption, to divalent iron, which is easily absorbed, and promote the absorption of iron. Vitamin C can also promote the absorption of non-ferrous hemoglobin iron by forming unstable complexes with iron molecules to release iron from other conjugates. Trace elements are minerals that are found in the body in amounts less than 0.01% of body weight, such as iron, copper, zinc, selenium, chromium, and iodine. It is generally believed that trace elements in the human body mainly comes from drinking water and food, in which a reasonable diet has a very important role in the intake and absorption of trace elements, and the content of trace elements in animal food is higher than plant food. Vitamin supplements need to be taken under the guidance of a professional doctor, and if you experience any discomfort, you should consult a doctor promptly.