Quantification of food loss and waste and its percentage estimation along the food supply chain in Korea.

Recent changes and food crisis at the international level have raised the awareness of food security in Korea; however, a problem that seems more urgent than the crisis is the lack of a national strategy for food loss and waste (FLW) in Korea. Moreover, where and to what extent food waste is generated in the food supply chain (FSC) is unknown. This study aimed to quantify food waste through material flow analysis and estimate the percentage of loss and waste at each stage of the FSC. The results revealed that 34.1% of the total supply of fruits and vegetables, meat and cereals was lost and wasted in Korea in 2015. Given that the proportion of edible parts in the food supplied for human consumption usually reaches 94.9%, a considerable amount of the food must have been discarded even though they are mostly edible. Furthermore, 47.6% of the total losses and wastes occurred at the upstream stages in the FSC, which include the agricultural production and processing stages, and 52.4% occurred at the downstream stages, which included the consumption stage, that is, distribution and household stages. In particular, more fruit and vegetable FLW were generated in the upstream stages of the FSC, whereas more meat and cereal loss and waste were generated in the downstream stages. The efficiency of policy implementation can be enhanced if food waste reduction strategies involve focusing more on areas with high losses.