A plant which is cultivated in the Andes mountain (Peru and Bolivia) that has a root with a high content in proteins and other nutrients (similar nutritional value to cereals) and secularly used as a source of food by andean population. Popularly, enhancing of fertility as been attributed to it, but rigorous scientific proof is lacking. Because it is a widely used tubercle as a food by the andean population with no known toxic effects, its consumption is regarded as compatible with breastfeeding.