Soy protein can be included in black bean burgers bought and distributed through USDA programs. It isn't mandatory.

Almonds, chia seeds, flaxseeds, peanuts, walnuts, sunflower seeds, pumpkin seeds and hemp seeds are nutrient-dense options ...

including soybeans, peanuts, green peas, and green beans. Also underneath this legume umbrella is the category of pulses, ...

Like other legumes, such as peanuts, peas, and lentils, black beans are prized for their high protein and fiber content. Black beans also contain several other key nutrients that benefit human health.

According to Masahito Yamamoto, who runs Yamamoto Shoten, a wholesaler of beans in Tokyo’s Tsukiji, the leading producers of black soybeans are the Tamba, Hokkaido and Iwate regions. Those ...