The burgeoning cultivated meat industry is progressing toward commercialized products as food innovators worldwide gain regulatory approval for cell-based products. However, one of the main sticking points holding back progress is the cost of serum, a crucial component of cultivated meat. Now, researchers in Tokyo, Japan, are making waves by using photosynthetic microorganisms to create a self-purifying, nutrient-circulating system for eco-friendly cultured meat production.