Protein can be derived from plant, such as fruits,vegetables, grains, nuts, and seeds or animal food like fish, meat, eggs, and diary food. Animal-based protein production demands significant amounts of global supply of energy and natural resources, while plant-based protein offers a lower environmental impact and a sustainable solution by reducing energy consumption, emissions, land usage, and water consumption. Nowadays, protein sources are expanding and the market is promising. It can also be derived from insects, microalgae, single-cell fermentation and etc.

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