Abstract
Food ingestion is a major route for human exposure and body burden to dioxins. We estimated the potential influence of changes in dietary patterns in Chinese population on human health risk to 2,3,7,8-TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin) over the last three decades. We performed multiple modeling scenario investigations to discriminate the contribution of 2,3,7,8-TCDD emissions and changes in dietary patterns to the cancer risks (CR) to dioxins. Results showed that changes in dietary patterns, featured by decreasing consumption of total grain (including all unprocessed grains) and vegetables and increasing intake of animal-derived foodstuffs, caused increasing CR from 7.3 × 10−8 in 1980 to 1.1 × 10−7 in 2009. Varying dietary patterns contributed 17% to the CR of Chinese population in 2009 under the fixed emission in 1980. The CR to 2,3,7,8-TCDD in urban and eastern China residents was higher considerably than those who lived in rural area and western China, attributable to higher emissions, household income, and greater intake of animal-derived foodstuffs in urban and eastern China inhabitants. On the other hand, more rapid increasing trend of the CR was found in rural residents due to their more rapid increase in the consumption of fat-dominated foods as compared with urban residents.
Highlights
Rapid economic development and increasing personal income over the last three decades has been leading to perhaps one of the most significant changes in food patterns in Chinese population in human history
This study assessed the effect of the changes in dietary patterns in Chinese population on their exposure risk to 2,3,7,8-TCDD for the past three decades
Due to rapid increasing in consumption of animal-derived foodstuffs, the annually averaged cancer risks (CR) increased from 7.3 × 10−8 in 1980 to 1.1 × 10−7 in 2009 under the condition of fixed emission in 1980 and annually varying dietary pattern from 1980 to 2009
Summary
Rapid economic development and increasing personal income over the last three decades has been leading to perhaps one of the most significant changes in food patterns in Chinese population in human history. With sufficient validation against monitored data, become useful for estimating the potential health risk caused by toxic chemicals, in the assessment of long-term trend of health risks subject to changes in dietary patterns. Such the trend is almost unknown in China and worldwide. The major objectives of this study were (1) to assess the effect and trend of the change in dietary patterns on human exposure risk to 2,3,7,8-TCDD in the past 30 years in China. The major objectives of this study were (1) to assess the effect and trend of the change in dietary patterns on human exposure risk to 2,3,7,8-TCDD in the past 30 years in China. (2) to fill data and knowledge gaps in human health and dioxin contamination to Chinese food web associated with rapid changes in the dietary patterns of Chinese population
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