Green extraction techniques employ eco-friendly solvents such as supercritical CO₂, deep eutectic solvents, and bio-based solvents to recover valuable compounds from natural sources like rice bran and algae. These methods replace toxic chemical solvents, ensuring a safer and more sustainableSustainable approach. Rice bran is rich in gamma oryzanol, tocopherols, and phytosterols, which have antioxidants and cholesterol-lowering properties. Traditional hexane-based extraction leaves harmful residues, whereas green solvents enhance oil yield, preserve nutrients, and minimize environmental impact. Algae species, available in millions, are an important biological resourceResource of polyunsaturated fatty acids, carotenoids, lipids, proteins, and other valuable biochemicals, that can find application in the foodFood, nutraceutical, pharmaceutical and cosmetic industries as well as for the production of biofuels. Conventional methods for the recovery of bioactives and secondary metabolites can not only degrade some of them, particularly those that are heat sensitive, but can harm the ecosystem. Green extraction, especially using supercritical CO₂, ensures higher purity and efficiency while reducing energyEnergy consumption and waste production. It promotes healthier, high-quality products, reduces carbon footprint, and aligns with clean-label trends. It supports advancing the biocircular economy by efficiently utilizing agricultural and freshwater and marine algae byproducts. This innovative approach fosters sustainabilitySustainability in foodFood, nutraceutical, and energyEnergy sectors, making it a crucial step toward eco-friendly industrial practices.