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Japan has more sewage mud than they can handle, and as a result the Japanese government turned to Mitsyuki Ikeda to explore possible solutions. This guy came up with an idea to processing human faeces and turning them into meat, thus completing the food cycle.
Sewage mud is high in protein, because it’s full of bacteria, most of which comes from human faeces. However, these micro-organisms are harmless, because they are killed by heat during the manufacturing process. According to initial tests, the artificial meat even tastes like beef, thanks to added soy protein, and Ikeda added some red food coloring to give it a more natural look. In terms of nutritive values, the turd burger doesn't sound bad at all: it’s 63% protein, 25% carbohydrates, 3% lipids and 9% minerals.