维生素A是重要的营养素之一,它与生长、发育、繁殖以及疾病有密切的关系。早期试验证明,维生素A缺乏可以影响抗体的形成,癌症也是由于食物中维生素A缺乏,体内维生素A不均衡引起的。一些人的流行病学实验、研究等表明,维生素A缺乏和许多疾病及癌症的发生相关,因此对维生素A与健康关系的研究则更加引起人们的重视。为了进一步证实维生素A水平与反映体内 Vitamin A is one of the important nutrients, it is closely related to growth, development, reproduction and disease. Early trials have shown that vitamin A deficiency can affect the formation of antibodies, cancer is also due to lack of vitamin A in food, vitamin A imbalance in the body caused. Some people’s epidemiological experiments, studies, etc., show that vitamin A deficiency and many diseases and cancer related, so the relationship between vitamin A and health research is more aroused people’s attention. In order to further confirm the level of vitamin A and reflect the body