Which among the following oils has the maximum protein content ?

Among the listed oilseeds, Soyabean (Soya bean) has the highest protein content. Soybeans are recognized as a premier plant-based protein source, containing approximately 26% to 40% protein, which is the highest among common plant products [t3]. While most oilseeds like sunflower, safflower, and castor are primarily cultivated for their high oil content (often 45-50%), soyabean is unique because it is equally valued for its high-quality protein meal [c1][c3]. Specifically, soy protein is considered a complete protein as it contains all eight essential amino acids [t3]. In comparison, sunflower seeds typically contain around 20% protein, and safflower seeds range between 11.5% to 16.0% protein [t6]. Castor seeds are primarily used for industrial oil and contain toxic proteins like ricin, making them unsuitable for direct protein consumption compared to the nutritionally dense soyabean [c1][t5].

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 25: Agriculture > Oil Seed Crops > p. 353
2. [2] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 26: Agriculture > 3. FRUITS > p. 260