Tomato processing waste, composed of skin and seeds oftomato cultivar Red Sea, was collected from a Greek tomato processing plant (NOMIKOS S.A., Aliartos, Viotia, Greece).Moisture content was determined at fresh tomato processing waste upon arrival at the laboratory and found to be80.48 ± 0.35%. Tomato waste material was air dried at 25◦C,homogenized in a domestic blender and finally ground in alaboratory mill (Cutting Mill Pulverisette 15, Fritsch Gmbh,Idar-Oberstein, Germany) equipped with a 0.5 mm sieve. Moisture content of ground dry tomato waste was 7.65 ± 0.21%.The dry ground material was kept in glass jars wrapped withaluminium foil at −20◦C before further processing.The critical steps involved in the EA and HP assisted extrac-tion of carotenoids from tomato waste are described in Fig. 1