Mung Beans
Food · Legume · Food, Typed Supps
Mung beans are small green beans that cook fast, are gentle on digestion once cooked, and are loaded with fiber, protein, and folate.
Stage by stage
- Chewing & Cooking (Mouth): Cooking softens the mung bean's seed coat and inactivates natural digestion-inhibiting compounds, while chewing breaks the beans down for digestion to begin.
- Gastric Breakdown (Stomach): Stomach acid and enzymes start breaking the beans' protein and starch into smaller, absorbable units.
- Intestinal Absorption (Small Intestine): In the small intestine, protein is broken into amino acids like lysine, starch is broken into glucose, and folate, potassium, magnesium, and iron are absorbed into the bloodstream.
- Circulation & Use (Bloodstream): Absorbed folate supports new cell and DNA synthesis, potassium and magnesium support heart and muscle function, and the fiber and resistant starch that escape digestion feed beneficial gut bacteria in the colon.
Timing
Mung beans are conventionally eaten cooked as part of a meal rather than alone or raw; pairing them with a vitamin C source can help offset the mineral-binding effect of residual phytic acid.
Time to effect
- Weeks: Fiber and resistant starch begin moderating blood sugar and digestion within hours of a meal, but measurable improvements in cholesterol and blood sugar control from regular mung bean or legume consumption typically take several weeks of consistent intake to appear in studies.
Allergens
None of the fourteen major allergens. Derived from what this food is, not from a product label.
Eating patterns
Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Gluten-free.
Satiety
226 on the satiety index, where white bread is 100 — very high. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
1 kg CO2e and 397 litres of freshwater per kg, matched to "Peas" in Poore & Nemecek (2018), Science 360.
Cost band
Cheap — roughly £2.2 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 105
- Protein: 7g
- Carbohydrate: 19.2g
- of which sugars: 2g
- Fat: 0.4g
- of which saturated: 0.1g
- Fibre: 7.6g
- Sodium: 2mg
Food vs. supplement
Mung beans supply folate, protein, and minerals together with fiber and resistant starch -- a combination whole legumes provide that a single-nutrient supplement like folic acid cannot replicate.
Kitchen tip
Rinse dried mung beans and simmer for about 20-30 minutes until tender -- unlike most dried beans, they need no overnight soak, and cooking also inactivates natural trypsin inhibitors and lectins.
Common myth
"Mung beans and their sprouts are always safe -- even more nutritious -- eaten raw." In reality: Raw dried mung beans contain trypsin inhibitors and hemagglutinin lectins that cause digestive distress and must be inactivated by cooking (about 20-30 minutes of boiling); separately, the FDA has linked raw and lightly cooked bean sprouts to repeated Salmonella and E. coli O157:H7 outbreaks because warm, humid sprouting conditions also favor bacterial growth, so children, pregnant women, older adults, and immunocompromised people are advised to avoid raw sprouts.
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