A waste-to-protein system that integrates a spread of waste-to-protein upgrading applied sciences has the potential to converge improvements on zero-waste and protein safety to make sure a sustainable protein future. We current a worldwide overview of food-safe and feed-safe waste useful resource potential and applied sciences to type and remodel such waste streams with compositional high quality traits into food-grade or feed-grade protein. The recognized streams are wealthy in carbon and vitamins and absent of pathogens and unsafe contaminants, together with meals waste streams, lignocellulosic waste from agricultural residues and forestry, and contaminant-free waste from the foods and drinks trade. A variety of chemical, bodily, and organic remedies may be utilized to extract vitamins and convert waste-carbon to fermentable sugars or different platform chemical compounds for subsequent conversion to protein. Our quantitative analyses recommend that the waste-to-protein system has the potential to maximise restoration of varied low-value assets and catalyse the transformative options towards a sustainable protein future. Nonetheless, novel protein regulation processes stay costly and useful resource intensive in lots of international locations, with protracted timelines for approval. This poses a major barrier to market enlargement, regardless of accelerated analysis and growth in waste-to-protein applied sciences and novel protein sources. Thus, the waste-to-protein system is a crucial initiative to advertise metabolic well being throughout the lifespan and sort out the worldwide starvation disaster.