Industrial applications of kale (Brassica oleracea var. sabellica) as a functional ingredient: a review

This review highlights the adaptability and impact of kale (Brassica oleracea var. sabellica) in the food industry. An overview has been provided of the valuable natural source of various bioactive compounds including proteins, pigments, polyphenols, chlorophyll, vitamins, and minerals. Numerous biological effects, such as antioxidant, antibacterial, anti-cancer, anti-inflammatory, and anti-diabetic properties, are displayed by these bioactive substances. Due to taste preferences and convenience, this vegetable is typically processed at home or by the catering and foodservice companies. The seasonal, perishable vegetable's shelf life can be prolonged by using preservation techniques (freezing and canning) with blanching. The physical and chemical characteristics of kale are altered by cooking, blanching, freezing, and canning. Numerous studies on the effects of different treatments and storage conditions on various kale quality metrics have been published. As a result, the waste generated during kale processing has the potential to provide economic benefits by reentering the food processing line as a food additive while providing sustainable and innovative solutions for food waste recovery.