NASA-Backed Scientists Turn Plastic Waste into Protein-Rich Cookies

Scientists have engineered a strain of yeast that can convert polyethylene terephthalate (PET) plastic and agricultural waste into the building blocks needed for protein‑rich, 3D‑printed cookies known as µBites. The bioconversion process produces proteins, fats, vitamins and even vanilla flavoring from the waste feedstock, a capability that was partly developed for NASA’s Deep Space Food Challenge. The resulting food product is designed to be compact, nutritious and suitable for long‑duration space missions where conventional food supplies are limited.

The technology leverages metabolic engineering to redirect the yeast’s natural pathways, allowing it to break down complex polymers and synthesize essential nutrients. By using discarded plastic and crop residues as raw materials, the system offers a dual benefit: it reduces plastic waste that would otherwise accumulate in landfills or oceans and provides a sustainable source of food ingredients. Researchers emphasize that the approach could be scaled for terrestrial applications, potentially addressing food insecurity in resource‑constrained regions while also supplying astronauts with reliable nutrition during deep‑space travel.

If the platform proves viable at commercial scale, it could transform waste streams into valuable food resources, offering a novel solution to two pressing global challenges—plastic pollution and food scarcity. The continued development of this yeast‑based system may pave the way for more resilient food production both on Earth and beyond.