# Study on the Influence of Consumers' Purchase Intention of Selenium-Rich Agricultural Products
## 1 Introduction  
\"Selenium is an essential trace element, which is widely found in human internal organs and has various pharmacological effects such as anti-cancer, heart protection, liver protection, preventing myopia and cataracts, detoxification, improving immunity, delaying aging and enhancing reproductive function, etc. It is known as \"the fire of life\". In 1973, the World Health Organization announced the trace element \"selenium\" to the world. In 1988, the Chinese Nutrition Society included the trace element \"selenium\" as one of the 15 dietary nutrients that our citizens must consume daily [1, 2, 3, 4]. At present, more than 40 countries and regions around the world are deficient in selenium, and two-thirds of China is internationally recognized as a selenium deficiency area, involving 22 provinces, cities and districts, and more than 700 million people have had a serious deficiency in selenium intake for a long time, 30% of which are in severe selenium deficiency areas [5, 6]. According to China's selenium-deficient areas and human nutrition requirements, the intake of the trace element \"selenium\" recommended by the Chinese Nutrition Society is 50 micrograms per person per day, but the latest results of the national dietary nutrition survey show that the national per capita daily intake of selenium is 39.9 micrograms, which is less than four fifths the amount recommended by the Chinese Nutrition Society [7, 8]. Therefore, from the current situation and requirements of the nutritional dietary structure of Chinese residents, selenium supplementation is aninevitable trend, and the way of selenium supplementation is mainly through dietary supplementation of selenium-rich food and medicinal supplementation of drugs and health products containing selenium. Compared with medicinal supplementation, dietary supplementation is mainly through the development of ecological organic selenium-rich agriculture, the development of ecological organic selenium-rich agricultural products, to improve the ecological organic \"selenium\" in the food chain. Modern medicine proves that dietary supplementation is one of the most scientific and safe ways for human to supplement selenium [9; 10]. Moreover, with the continuous improvement of people's living standards, people's nutritional health care views are increasingly enhanced, and people not only want to eat safe, but also want to eat healthy. Selenium-rich products cater to this consumer demand and are more and more favored by consumers. Vigorously developing ecological organic selenium-rich agriculture has a broad prospect. Developed countries have already developed selenium-rich agriculture. In addition to traditional selenium-rich crop products, in the United States, Japan, Western Europe, South Korea, Malaysia, Australia and other countries, pure natural selenium-rich livestock products such as selenium-rich milk, selenium-rich pork, selenium-rich eggs and other products have been successfully marketed [11; 12]. The United States has developed pure natural selenium-rich juice, selenium-rich pasture and selenium-rich milk, and Australia has developed pure, natural selenium-rich wheat, selenium-rich beer, selenium-rich cookies, selenium-rich beef jerky and other products [13; 14].