A comparative review on novel-assisted extraction techniques for retrieving protein from some potential plant sources

Global protein demand is rising as populations grow and consumers seek sustainable and nutritious alternatives. Plant-based proteins are favored for their consumer acceptance, lower environmental impact, and health benefits. However, the main challenge in extracting high-quality and functional plant proteins for food applications is to select the most suitable extraction method. Conventional protein extraction methods (acid-alkaline and salt extraction) have several drawbacks. Novel-assisted extraction techniques such as enzyme-assisted, ultrasound-assisted, microwave-assisted, high-pressure-assisted, and pulse electric field-assisted extractions, have proven effective in enhancing the yield of high-quality protein. This review examines recent data on novel protein extraction technologies from six promising plant protein sources under optimized conditions, focusing on their yield, protein quality, and functional properties, as well as mechanisms, drawbacks and future perspectives compared to conventional techniques. The final section explores recent trends in enriching foods with protein isolated from some potential plant sources, highlighting their ability to improve food quality and tackle protein deficiencies. The available data indicate that under optimized conditions, cell-disruptive techniques have the potential to improve protein recovery, and functional properties from plant sources, while minimizing environmental pollution. Given the recent surge in interest in alternative plant-based proteins, this review will offer insights and references for future research and development in plant-based protein processing.