Soybean is a versatile, high-protein legume cultivated worldwide for oil, animal feed, and human food products (tofu, soymilk, tempeh). It enriches soil through nitrogen fixation and is processed into oil and meal for diverse industrial and food applications.
Key features: High protein content, oilseed utility, crop rotation benefits, and wide culinary uses.
Total fat19–20 gMostly unsaturated; source of vegetable oil
Carbohydrates30 gIncludes dietary fiber and oligosaccharidesDietary fiber9–10 gBeneficial for digestionIron15 mgGood plant-source iron (non-heme)Calcium277 mgHigher in some processed soyfoods (tofu)VitaminsB-complex, vitamin KNotable for folate and vitamin K content
Soybeans are processed into two principal commercial streams: oil and meal. Oil extraction (mechanical pressing, solvent extraction) yields crude soybean oil that is refined for food or industrial use. The remaining soybean meal is a high-protein ingredient for animal feed or further processed into textured vegetable protein (TVP) and isolated soy protein for food applications.
Quality factors include moisture content, broken seeds, foreign matter, and presence of mold or off-odors. For long-term storage, maintain low moisture (≤13%) and cool, dry conditions to prevent insect damage and aflatoxin development. Proper aeration and regular monitoring are recommended.
Soybean expands livelihoods and provides protein and oil globally, but land-use change for soybean planting can carry environmental risks if not managed sustainably. Practices such as conservation tillage, cover cropping, and responsible sourcing (traceability and certification) help reduce negative impacts.
| Variety/Type | Main Use | Maturity Group (example) |
|---|---|---|
| Edamame (vegetable soybean) | Fresh vegetable / frozen snack | III–V (warm regions) |
| Food-grade (high-protein) | Tofu, soymilk, natto, tempeh | II–VII (varies by location) |
| Oilseed (commercial) | Vegetable oil, biodiesel | I–IX (wide range) |
| High-oleic / specialty | Stable cooking oil, specialty markets | III–VII |
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