Lupinus mutabilis

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Lupinus mutabilis
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Tribe: Lupineae
Genus: Lupinus
Subgenus: Platycarpos (Wats.) Kurl.
Species: L. mutabilis
Binomial name
Lupinus mutabilis
Sweet

Lupinus mutabilis is a species of lupin grown in the Andes for its edible bean. Vernacular names include tarwi, tarhui, chocho, altramuz, Andean lupin, South American lupin, or pearl lupin.

The bone-white seed contains more than 40% protein and 20% fat and has been used as a food by Andean people since ancient times, especially in soups, stews, salads and by itself mixed with fried maize. Like other legumes, its protein is rich in the essential amino acid lysine. It has a soft seed coat that makes for easy cooking.

It may have not been more widely used because it is bitter due to some alkaloid content. However, the alkaloids are water-soluble and can be removed by soaking the seeds for some days in water.

Average protein content is 46% (varying between 41 and 51%) and average fat content is 20% (varying between 14 and 24%) The protein digestibility and nutritional value are reportedly similar to those in soybeans.

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