It's dry, full of fiber, and resembles roofing tiles -- but the main problem is that it's too often contaminated with excessive amounts of aflatoxin. See: htt

It's dry, full of fiber, and resembles roofing tiles -- but the main problem is that it's too often contaminated with excessive amounts of aflatoxin. See: https://www.feedipedia.org/node/699 https://www.feedipedia.org/node/699 Current market price is around $350/ton, though, which makes it one of the cheapest protein sources around... Edited to add: There's also soybean oil cake, sunflower oil cake, and others. Sunflower cake might be interesting as a low cost food/protein supplement in humans.