Mountain Yam

Nutrition per ~85 g · ¾ cup chopped

11.7 g net carbs after fiber.

Vitamins

Minerals & other

Bioactives estimated

Representative amounts for this food, not measured for this item. Real content varies widely by variety, ripeness and storage.

What drives the score weighted inputs

These are the scored components, not a sum: the published score also reflects normalisation across the catalog, so the parts above will not add to 75.

What it feeds primary sources only

Systems

Pathways

Overview

Mountain yam (Dioscorea spp.) is a nutrient-dense tuber cultivated throughout Asia, Africa, and the Pacific regions, historically valued in traditional medicine systems. Unlike common potatoes, mountain yams contain unique phytochemical compounds including diosgenin and allantoin, though present in modest quantities. The vegetable derives its longevity relevance primarily from its resistant starch content—carbohydrates that resist digestion in the small intestine, functioning similarly to fiber. This property promotes beneficial gut microbiota growth and improves insulin sensitivity, critical factors in metabolic aging. Mountain yams provide excellent potassium (418 mg per 100g), supporting cardiovascular health and blood pressure regulation. The low sodium content combined with high potassium makes it particularly valuable for hypertension management. While vitamin and mineral content is moderate, the synergistic combination of resistant starch, potassium, and fiber creates a food aligned with principles of metabolic health and longevity. Mountain yams' gentle glycemic impact and satiety-promoting properties make them a strategic carbohydrate choice for those prioritizing healthy aging.

Health benefits 4

Pairs with

• Pair with olive oil or avocado because fat-soluble phytochemicals and fat-soluble vitamin absorption are enhanced; also slows gastric emptying for sustained energy
• Combine with leafy greens (spinach, kale) because vitamin K from greens synergizes with mountain yam's potassium for vascular calcification prevention
• Serve with fermented foods (kimchi, sauerkraut, miso) because existing probiotics work synergistically with mountain yam's prebiotic resistant starch to expand beneficial gut colonies
• Pair with vitamin C sources (citrus, bell peppers) because ascorbic acid enhances non-heme iron bioavailability from the mineral-rich yam

In the kitchen

• Store mountain yams in cool, dark, well-ventilated conditions (50-60°F); avoid refrigeration which converts starches and reduces shelf life to 1-2 weeks
• Cook with skin on whenever possible—the periderm contains concentrated polyphenols and resistant starch; boiling or steaming preserves these better than roasting
• Allow cooked mountain yams to cool to room temperature before consumption to maximize resistant starch formation through retrogradation
• Choose firm yams without soft spots or sprouting; test for doneness by piercing with a fork—flesh should be creamy, not mealy
• Consume 1-2 servings (100-200g) as part of mixed meals to optimize satiety and glucose response; avoid isolated consumption on an empty stomach

When to eat it midday

Mountain yam's resistant starch and fiber provide sustained energy and stable blood glucose during afternoon hours; midday consumption allows full microbiota fermentation before evening sleep. Pairing with protein and fat optimizes satiety through lunch into afternoon.

Breaks a fast

Best avoided

• late evening within 3 hours of sleep—may cause digestive fermentation and gas production

While not suitable for strict fasting periods, mountain yam can be included in time-restricted eating windows as a prebiotic carbohydrate. Best consumed as part of a balanced meal with protein and fat rather than in isolation.