The aim of the review is to focus on the main processing and economic challenges associated with these oil industries5



The aim of the review is to focus on the main processing and economic challenges associated with these oil industries (lack of organized cultivation, collection, processing, research and market linking) and fetch the attention towards the application of green technology. The present article provides a systematic review to open new sphere of understanding unconventional oil seeds with its geographical distribution, chemical composition, health benefits and research. Further, new sources of unconventional oil (cotton seed, rice bran, sal seed, mango kernel etc.) may impart an alternative source of edible oil, which can fulfil country’s edible oil deficit with economic contribution. In inference, the combined evidence supports the assertion that unconventional source of oils may provide an alternatives of major seed oils.

Vegetable oils are the main source of dietary fat in Indian diets. These oils/fats hold a major contribution, not only in our diet as cooking or frying medium, salad oil, or in food product formulation, but also in regard to the economy. The domestic vegetable oil production of 8.2 MT is not enough to meet the local requirements as compare to demand of 12.5 MT. Vegetable oils are the most important ingredients that are liberally used for making each type of dish in Indian households using common cooking methods, viz. tempering, sautéing, shallow frying and deep frying (Ramadas and Eshwaran 2000; Johnson and Saikia 2009). The per capita consumption (48 g/person/day) of fats/oils in India is far below the world average (79 g/person/day) (Ministry of food processing 2011). India is the world’s largest importer of oils as about 40–50% of the local demand for edible oils in India have to be met by imports (FAO, 2009).

Fats and oils act as major sources of fatty acids, which serve as regulators of several physiological functions as it acts as precursors of various hormones. They absorb vitamins A, D, E and K, thereby supporting the growth and development of the human body. Fats also aid in imparting flavor and texture of the food and provide a feeling of satiety when consumed as 

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