Selenium distribution in the Chinese environment and its relationship with human health: A review

This paper reviewed the Se in the environment (including total Se in soil, water, plants, and food), the daily Se intake and Se content in human hair were also examined to elucidate Se distribution in the environment and its effects on human health in China. Approximately 51% of China is Se deficiency in soil, compared with 72% in the survey conducted in 1989. Low Se concentrations in soil, water, plants, human diet and thus human hair were found in most areas of China. The only significant difference was observed between Se-rich and Se-excessive areas for Se contents in water, staple cereal, vegetables, fruits, and animal-based food, no remarkable contrast was found among other areas (p>0.05). This study also demonstrated that 39–61% of Chinese residents have lower daily Se intakes according to WHO/FAO recommended value (26–34μg/day). Further studies should focus on thoroughly understanding the concentration, speciation, and distribution of Se in the environment and food chain to successfully utilize Se resources, remediate Se deficiency, and assess the Se states and eco-effects on human health. [Display omitted] •In China, the Se deficient area decreased from 72% in 1989 to 51% nowadays.•Soil Se content descended as Northwest>South>Central>East>Southwest>Northeast>North China.•Some new Se-rich areas were found in low Se parts of China area as belt or spot.•Se in cereals and meat was significantly correlated with the corresponding soil Se content.