Insights into potential value and sustainable utilisation of pumpkin peel: A review

Abstract

Pumpkin is a widely cultivated and consumed vegetable; meanwhile, pumpkin peel (PL) is usually regarded as a majority by-product from the pumpkin processing chain and discarded into landfills. This disposal method adversely affects the environment and food security. In line with sustainable development goals and Industry 5.0, PL has been received much attention since it contains high potential value, such as polysaccharides, phenolics, and carotenoids, which could be re-utilised as promising ingredient in many sectors. On the other hand, resourceful utilisation of food by-products can reduce food waste and environmental burden and increase source efficiency, which is the key part toward sustainable food development and a balanced future. This review highlights the potential value of PL and provides an overview of current utilisation strategies and advances. Overall, this review could provide useful information to promote a complete valorisation of PL and contribute to a more sustainable food system.