Serum vitamin A

When there is no vitamin A intake in the food, the daily loss in the liver is about 0.5% of its total. Vitamin A is closely related to normal vision and is necessary for the normal growth of bones. It helps cell proliferation and growth and is important for the normal formation, development, and maintenance of epithelium. In recent years, it has been confirmed that vitamin A has the effect of delaying or preventing pre-lesions, preventing chemical carcinogens, especially preventing epithelial malignant tumors. Quantitative determination of serum vitamin A is of great significance for the diagnosis and observation of certain diseases.