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If you Google the words “green smoothie,” you will be inundated with recipes for the perfect healthy shake. You might have to look a little farther for the elixir popular in Peru and Bolivia, which relies not on leafy greens, but on the endangered Titicaca water frog.

While the American green smoothie is promoted as the “fastest way to get your veggies,” its Andean counterpart is considered a cure for an array of ailments, including anemia, fever, tuberculosis, typhus and even female infertility.