It is made from soybeans with added calcium sulfate, and sometimes flavored with salt, soy sauce, and spices such as cinnamon, star anise, and licorice.
This food's name is composed of two syllables, dòu (豆, "bean"), and gān (simplified Chinese: 干; traditional Chinese: 乾; lit.
[1] The full name is called doufu gan (simplified Chinese: 豆腐干; traditional Chinese: 豆腐乾; lit.
Dougan has a lower moisture content than tofu in that it is drier, and also by weight, where dougan has a greater bean-to-water ratio than tofu.
This means that dougan contains more protein per gram, as the water density is less.