Mashua

Mashua is a high-altitude Andean tuber of the Tropaeolaceae family, valued for its starchy flesh, pungent flavor, and notable content of glucosinolate compounds. It is one of the traditional staple roots alongside potato, oca, and ulluco in the central Andes.

History & Origins

Mashua has been cultivated in the Andean highlands for at least 4,000 years, with tuber remains recovered from pre-Columbian archaeological sites in Peru and Bolivia. It was extensively grown during the Inca Empire, where chroniclers noted its role as a reliable subsistence crop, and it continues to be cultivated in smallholder fields from Ecuador to northern Argentina, particularly above 3,000 meters elevation.

Nutrition Facts

Per 100 g, edible portion (estimated)

• 76 kcalCalories
• 2.4 gProtein
• 0.2 gFat
• 16.8 gCarbs
• 1.6 gFiber
• 3.1 gSugars
• 285 mgPotassium
• 32 mgVitamin C
• 18 mcgVitamin A

Culinary Uses

• Boiled and served as a starchy side dish, often dressed with salt or cheese
• Added to hearty Andean soups, stews, and pachamanca earth-oven roasts
• Naturally sun-dried to make papa seca-style dehydrated tubers for long storage
• Pickled in vinegar with chili to temper its pungency and add brightness

Known Benefits

• Rich source of vitamin C and complex carbohydrates for sustained energy
• Contains glucosinolates studied for anti-inflammatory and antimicrobial properties
• Provides dietary fiber and minerals such as potassium and iron
• Traditionally associated with diuretic and tonic effects in Andean herbal practice

Hidden Benefits

• Betalain pigments contribute antioxidant activity similar to beetroot
• Prebiotic fiber fraction may support beneficial gut microbiota
• Isobutyl glucosinolate breakdown products have shown in vitro activity against crop pests and parasites
• Resistant starch fraction increases after cooking and cooling, lowering glycemic impact

Cautions & Considerations

• Raw tubers are strongly pungent and mildly irritating to mucous membranes
• Contains goitrogenic glucosinolates that may affect thyroid function if eaten raw in large quantities
• Should be cooked before consumption to reduce sharp flavor and potential anti-nutritional compounds
• May trigger sensitivities in individuals allergic to other Tropaeolaceae plants