Last year scientists tipped an aquatic weed to be the next alternative plant protein superfood. One trial by the American Diabetes Association comparing a green duckweed shake and a yogurt-based equivalent in 20 obese participants found the duckweed to be an emerging plant protein source with potential beneficial effects on glucose levels. So what is duckweed? As the name suggests, the plant can be found floating on water and is a food source for waterfowl, as well as tadpoles and fish. There are 37 species in the duckweed (Wolffia globosa) family. It’s particularly famous for its speedy...