*Lupinus mutabilis*
Known locally as "Chocho" or "Tarwi," this Andean legume is the only lupin species domesticated in the Americas, distinguished by its exceptional protein density.
Fig 1. *Lupinus mutabilis* morphology
Botanical Profile
Origin: Native to the Andean region (Ecuador, Peru, Bolivia), cultivated at altitudes between 2,800 and 4,000 meters above sea level.
Nitrogen Fixation: As a legume, it fixes atmospheric nitrogen, improving soil fertility and requiring minimal synthetic fertilizers, making it a cornerstone of regenerative agriculture.
Alkaloid Content: Naturally high in quinolizidine alkaloids (bitter compounds) which act as natural pesticides. These must be removed via a debittering process (washing) unless "sweet" low-alkaloid varieties are used.
Nutritional Superiority
| Component (per 100g dry) | Andean Lupin | Soybean | Chickpea | Pea |
|---|---|---|---|---|
| Protein | 44 - 51% | 36 - 40% | 19 - 22% | 20 - 25% |
| Fat (Oil) | 16 - 20% | 18 - 20% | 6% | 1 - 2% |
| Fiber | 7 - 10% | 9% | 17% | 10 - 15% |
| Carbohydrates | Low | Medium | High | Medium |
*Data compiled from FAO and independent laboratory assays. Values may vary by varietal and processing method.
Industrial Applications
Protein Isolates
High solubility and emulsifying properties make lupin protein isolate ideal for plant-based milks, yogurts, and meat analogues.
Functional Flours
Used in bakery applications to increase protein content and improve texture without gluten, though it is often mixed with other flours.
Whole Bean Snacks
Pickled or brined whole beans (traditional "cevichochos") are gaining popularity as a high-protein, low-carb snack in Western markets.